BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Light charged Higgs boson in $H^\\pm h$ associated production at t he LHC DTSTART;VALUE=DATE-TIME:20220322T130000Z DTEND;VALUE=DATE-TIME:20220322T131500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2295@indico.tlabs.ac.za DESCRIPTION:Speakers: Mohamed Krab (Sultan Moulay Slimane University)\nIn this work\, we investigate the production of charged Higgs boson via $pp \ \to H^\\pm h$ at the LHC in the Two-Higgs Doublet Model (2HDM) Type-I. By focusing on the case where $H$ is identified as the observed Higgs boson o f mass 125 GeV\, we study the aforementioned Higgs boson production chann el and explore their bosonic decays\, namely $H^\\pm \\to W^\\pm h$ and $H ^\\pm \\to W^\\pm A$\, which can reach a sizeable Branching Ratio (BR) and often dominate over the fermionic decays in the theoretically and experim entally viable parameter space. In this regard\, we demonstrate that the p roduction process $pp \\to H^\\pm h$ followed by $H^\\pm \\to W^\\pm h$ an d/or $H^\\pm \\to W^\\pm A$ could well be the most promising discovery cha nnel for light $H^\\pm$ at the LHC.\n\nhttps://indico.tlabs.ac.za/event/10 9/contributions/2295/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2295/ END:VEVENT BEGIN:VEVENT SUMMARY:Welcome from the Network of African Science Academies DTSTART;VALUE=DATE-TIME:20220321T082500Z DTEND;VALUE=DATE-TIME:20220321T083000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2294@indico.tlabs.ac.za DESCRIPTION:Speakers: Norbert Hounkonnou (Network of African Science Acade mies)\nhttps://indico.tlabs.ac.za/event/109/contributions/2294/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2294/ END:VEVENT BEGIN:VEVENT SUMMARY:Welcome from the Ministry of Higher Education\, Science and Innova tion of South Africa DTSTART;VALUE=DATE-TIME:20220321T081500Z DTEND;VALUE=DATE-TIME:20220321T082500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2293@indico.tlabs.ac.za DESCRIPTION:Speakers: Yonah Seleti (Department of Science and Innovation o f South Africa)\nhttps://indico.tlabs.ac.za/event/109/contributions/2293/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2293/ END:VEVENT BEGIN:VEVENT SUMMARY:Welcome from the Ministry of Higher Education\, Scientific Researc h and Innovation of Morocco DTSTART;VALUE=DATE-TIME:20220321T080500Z DTEND;VALUE=DATE-TIME:20220321T081500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2292@indico.tlabs.ac.za DESCRIPTION:Speakers: Mohammed Tahiri (Department of Higher Education of M orocco)\nhttps://indico.tlabs.ac.za/event/109/contributions/2292/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2292/ END:VEVENT BEGIN:VEVENT SUMMARY:Introduction DTSTART;VALUE=DATE-TIME:20220321T080000Z DTEND;VALUE=DATE-TIME:20220321T080500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2291@indico.tlabs.ac.za DESCRIPTION:Speakers: Bruce Mellado-Garcia (iThemba LABS\, Wits)\, Yahya T ayalati (Faculty of Sciences\, Mohammed V University\, Rabat)\nhttps://ind ico.tlabs.ac.za/event/109/contributions/2291/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2291/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for Dark Matter with the ATLAS detector at the LHC DTSTART;VALUE=DATE-TIME:20220323T094500Z DTEND;VALUE=DATE-TIME:20220323T101500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2290@indico.tlabs.ac.za DESCRIPTION:Speakers: Rachid Mazini (Institute of Physics\, Academia Sinic a Taiwan)\nhttps://indico.tlabs.ac.za/event/109/contributions/2290/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2290/ END:VEVENT BEGIN:VEVENT SUMMARY:Extended Scalar Sectors and new Physics Beyond the Standard Model DTSTART;VALUE=DATE-TIME:20220322T103000Z DTEND;VALUE=DATE-TIME:20220322T110000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2276@indico.tlabs.ac.za DESCRIPTION:Speakers: Rachid Benbrik (Cadi Ayyad University)\nhttps://indi co.tlabs.ac.za/event/109/contributions/2276/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2276/ END:VEVENT BEGIN:VEVENT SUMMARY:A theoretical review of astroparticles DTSTART;VALUE=DATE-TIME:20220323T080000Z DTEND;VALUE=DATE-TIME:20220323T083000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2284@indico.tlabs.ac.za DESCRIPTION:Speakers: Stefano Profumo (University of California\, Santa Cr uz)\nhttps://indico.tlabs.ac.za/event/109/contributions/2284/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2284/ END:VEVENT BEGIN:VEVENT SUMMARY:Searching for Dark Matter Scattering\, on Earth and in the Stars DTSTART;VALUE=DATE-TIME:20220322T083000Z DTEND;VALUE=DATE-TIME:20220322T090000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2289@indico.tlabs.ac.za DESCRIPTION:Speakers: Nicole Bell (University of Melbourne)\nhttps://indic o.tlabs.ac.za/event/109/contributions/2289/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2289/ END:VEVENT BEGIN:VEVENT SUMMARY:On the quantum geometry of gravity DTSTART;VALUE=DATE-TIME:20220321T165500Z DTEND;VALUE=DATE-TIME:20220321T171000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2254@indico.tlabs.ac.za DESCRIPTION:Speakers: Fanomezantsoa RAZAFIMAHATRATRA (University of Antana narivo)\nThe quantum algebra of observables of particles in homogeneous sp ace from bicrossed product model $ \\mathcal{C}[x]\\blacktriangleright\\jo inrel\\mathrel{\\triangleleft}\\mathcal{C}[p] $ forms a Hopf algebra $ A(+ \,\\mu\,\\eta\,\\Delta\,\\epsilon) $. Quantum mechanic is formulated algeb raically while gravity is more geometric. Quantum geometry which is a non commutative geometry\, with Hopf algebra give us an access to an algebraic language of gravity. The duality of Hopf algebra with Von Neuman algebra (Hopf duality) which relates observables and states give a quantification of gravity if one can show that the non commutativity of the coproduct $ \ \Delta $ curves the phase space.\n \n **Keyword**: Quantum gravity\, Qua ntum group\, Hopf algebra\n\nhttps://indico.tlabs.ac.za/event/109/contribu tions/2254/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2254/ END:VEVENT BEGIN:VEVENT SUMMARY:Are Jets Narrowed or Broadened in e+A SIDIS? DTSTART;VALUE=DATE-TIME:20220322T163000Z DTEND;VALUE=DATE-TIME:20220322T164500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2270@indico.tlabs.ac.za DESCRIPTION:Speakers: Will Horowitz (University of Cape Town)\nWe compute the in-medium jet broadening to leading order in energy in the opacity exp ansion. At leading order in $\\alpha_s$ the elastic energy loss gives a je t broadening that grows with $\\ln E$. The next-to-leading order in $\\alp ha_s$ result is a jet narrowing\, due to destructive LPM interference effe cts\, that grows with $\\ln^2 E$. We find that in the opacity expansion th e jet broadening asymptotics are---unlike for the mean energy loss---extre mely sensitive to the correct treatment of the finite kinematics of the pr oblem\; integrating over all emitted gluon transverse momenta leads to a p rediction of jet broadening rather than narrowing. We compare the asymptot ics from the opacity expansion to a recent twist-4 derivation and find a q ualitative disagreement: the twist-4 derivation predicts a jet broadening rather than a narrowing. Comparison with current jet measurements cannot d istinguish between the broadening or narrowing predictions. We comment on the origin of the difference between the opacity expansion and twist-4 res ults.\n\nhttps://indico.tlabs.ac.za/event/109/contributions/2270/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2270/ END:VEVENT BEGIN:VEVENT SUMMARY:Azimuthal decorrelation between jets at all orders in QCD hard pro cesses DTSTART;VALUE=DATE-TIME:20220322T161500Z DTEND;VALUE=DATE-TIME:20220322T163000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2202@indico.tlabs.ac.za DESCRIPTION:Speakers: Hana Benslama (university of Batna1)\nWe study the a zimuthal decorrelation $\\Delta \\phi$ for di-jet production that promise to reveal important information on perturbative and non-perturbative QCD d ynamics. This observable has been measured by the H1 collaboration that em ployed the $E_{t}$-weighted recombination scheme whereby our observable is continuously global and sensitive to soft and/or collinear emissions in t he back-to-back region\, giving rise to single and double logarithms. We n ow wish to employ the four-vector recombination scheme (E-scheme) that mak es our observable falling into the category of non-global QCD observables. Hence the resummation becomes highly non trivial due to the presence of n on-global and/or clustering algorithms when the jets are defined using the $k_{t}$ and anti-$k_{t}$ clustering procedure. In the present work we car ry out this resummation to next to leading logarithmic accuracy including the non-global and clustering logarithms involved in DIS at HERA.\n\nhttps ://indico.tlabs.ac.za/event/109/contributions/2202/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2202/ END:VEVENT BEGIN:VEVENT SUMMARY:Very-high-energy neutrino production in jetted active galactic nuc lei DTSTART;VALUE=DATE-TIME:20220323T111500Z DTEND;VALUE=DATE-TIME:20220323T113000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2223@indico.tlabs.ac.za DESCRIPTION:Speakers: Markus Boettcher (North-West University)\nAs the num ber of tentative associations of very-high-energy neutrinos\ndetected by I ceCube with jet-dominated AGN is increasing\, also the \ndevelopment of th eoretical models for neutrino production in AGN jets\nis advancing rapidly . This talk will provide a review of the basic\nphysics constraints for VH E neutrino production in AGN jets as well\nas applications to recent tenta tive neutrino - blazar associations.\n\nhttps://indico.tlabs.ac.za/event/1 09/contributions/2223/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2223/ END:VEVENT BEGIN:VEVENT SUMMARY:The off-shell Higgs production and measurement of its decay width with the ATLAS experiment DTSTART;VALUE=DATE-TIME:20220323T141500Z DTEND;VALUE=DATE-TIME:20220323T143000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2250@indico.tlabs.ac.za DESCRIPTION:Speakers: Abdualazem Mohammed (University of the Witwatersrand )\nThe measurement of the off-shell Higgs production and its decay width i s performed in the Higgs decay channels of $ZZ\\rightarrow 4\\ell$ and $ZZ \\rightarrow 2\\ell2\\nu$. The measurement uses Monte Carlo samples at a c entre-of-mass energy of 13 TeV\, produced according to the ATLAS detector configurations with an integrated luminosity of 139 fb$^{-1}$. The results are presented as an expected upper limit on the off-shell Higgs signal st rength at 95% confidence levels (CLs). In addition\, the $ZZ$ off-shell an d on-shell combined results are shown.\n\nhttps://indico.tlabs.ac.za/event /109/contributions/2250/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2250/ END:VEVENT BEGIN:VEVENT SUMMARY:Thermal Performance of Developed Carbon Nanotubes and Nanospheres Based Thermal Interface Materials for Heat Dissipation Applications. DTSTART;VALUE=DATE-TIME:20220323T165000Z DTEND;VALUE=DATE-TIME:20220323T170500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2265@indico.tlabs.ac.za DESCRIPTION:Speakers: Othmane Mouane (University of Witwatersrand)\, Edwar d Nkadimeng (University of the Witwatersrand)\nIn this study\, the incorpo ration of 0D and 1D carbon nanomaterials in a commercial thermal interface material is reported to enhance the heat transfer of electronic devices. The investigated thermal interface materials were fabricated following a p rotocol based on sonication of the carbon nanomaterials and the thermal co mpound in acetone at 55 °C. In order to test the applicability of the fab ricated thermal interface materials\, a setup was designed to simulate the operating conditions of standard electronic components. The experimental setup monitored the heat dissipation and transmission to the heat sink and allowed the acquisition of the data by means of LabVIEW software. The rol e of the carbon nanomaterials incorporated was studied by varying the mass in the thermal interface materials in a range between 0 and 10 %. The lar ge heat transfer is reported with thermal interface materials containing 1 % of carbon nanomaterials\, corresponding to a temperature drop of 2 °C. In addition\, the thermal resistance Rth of the thermal interface material s was characterised by the ASTM D5470 approach. The reproducibility and re liability of the reported results were shown as part of the study. These m easurements are found to be in accordance with the testing stand results. The new thermal interface material was tested in the low voltage power ele ctronics and a temperature drop of over 5 °C was observed. The use of the se new thermal interface material as part of the current upgrade of the AT LAS detector at CERN will have good impact\, such as protecting the electr onics from overheating and will expand their life span.\n\nhttps://indico. tlabs.ac.za/event/109/contributions/2265/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2265/ END:VEVENT BEGIN:VEVENT SUMMARY:Detector performance and physics reach of at Muon Collider DTSTART;VALUE=DATE-TIME:20220323T163500Z DTEND;VALUE=DATE-TIME:20220323T165000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2263@indico.tlabs.ac.za DESCRIPTION:Speakers: Chiara Aimè (Istituto Nazionale di Fisica Nucleare - Università di Pavia)\nA muon collider is very promising for the future of high energy physics and is becoming a realistic option. It combines the high precision of electron-positron machines\, with a low level of beamst rahlung and synchrotron radiation\, and the high centre-of-mass energy and luminosity of hadron colliders. Beams with an intensity of the order of 1 0$^{12}$ muons per bunch are necessary to obtain the desired luminosity\, which entails a very high rate of muons decay. Among the technological cha llenges\, the treatment of the Beam-induced Background is one of the most critical issues for the detector design. \nThis contribution will present the detector performance for collider machines working at centre-of-mass e nergies up to 3 TeV\, discussing\, in particular\, the strategies studied to mitigate the effect of the Beam-induced Background. Moreover\, the reac h of the most representative physics processes will also be discussed.\n\n https://indico.tlabs.ac.za/event/109/contributions/2263/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2263/ END:VEVENT BEGIN:VEVENT SUMMARY:The geometry description of High Granularity Timing Detector with XML-based format DTSTART;VALUE=DATE-TIME:20220323T162000Z DTEND;VALUE=DATE-TIME:20220323T163500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2247@indico.tlabs.ac.za DESCRIPTION:Speakers: Selaiman Ridouani (University Mohammed First in Oujd a)\nThe main purpose of the ATLAS experiment is to study the proton-proton collisions from the Large Hadron Collider (LHC) in order to exploit the f ull discovery potential of the LHC. ATLAS' exploration uses precision meas urement to push the frontiers of knowledge by seeking answers to fundament al questions.\nA new phase called High Luminosity LHC (Run4) will start op eration in mid-2026\, which aims to deliver an integrated luminosity of up to 4000$fb^{−1}$. To meet the quest for high precision measurements in a high luminosity environment\, a new subsystem called High Granularity Ti ming Detector (HGTD) will be installed to mitigate the pileup effect by pr oviding timing information. It will aid the track-vertex association in th e forward region by incorporating timing information into the reconstructe d tracks. The Low Gain Avalanche Detector (LGAD) sensors will be used to m eet these changing needs. \nFor the perspective of the HGTD description\, ATLAS collaboration is moving towards the use of an XML-based format for d efining this subdetector description\, this work aims to describe the HGTD geometry using this format\, then integrate it with ATLAS software and to the simulation infrastructure.\n\nhttps://indico.tlabs.ac.za/event/109/co ntributions/2247/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2247/ END:VEVENT BEGIN:VEVENT SUMMARY:The use of GANs in the search for new resonances at the LHC using semi-supervised machine learning techniques DTSTART;VALUE=DATE-TIME:20220323T163000Z DTEND;VALUE=DATE-TIME:20220323T164500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2192@indico.tlabs.ac.za DESCRIPTION:Speakers: Benjamin Lieberman (University of Witwatersrand)\nIn the search for new physics\, beyond the standard model\, the use of semi- supervised machine learning techniques provides a methodology to extract s ignal processes while minimizing potential biases caused by prior understa nding. When using semi-supervised techniques in the training of machine le arning models\, over-training can lead to background events incorrectly be ing labeled as signal events. The extent of false signals generated must t herefore be quantified before semi-supervised techniques can be used in re sonance searches.\n\nIn searches for resonances within a given mass range\ , the significance of observing a local excess of events\, must consider t he probability of observing the excess elsewhere within the range. This is known as the “look elsewhere effect” and must be controlled for reson ance searches. The semi-supervised technique has additional “look elsewh ere effects” which need to be calculated. Generative adversarial network s are used in conjunction with Monte Carlo event generation to produce sca lable datasets while minimizing inefficiencies in event weighting. The Was serstein GAN with gradient penalty is evaluated in the expansion and un-we ighting of Z𝛾 Monte Carlo data in order to calculate the “look elsewh ere effect” within the semi-supervised studies.\n\nhttps://indico.tlabs. ac.za/event/109/contributions/2192/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2192/ END:VEVENT BEGIN:VEVENT SUMMARY:GEANT4 MONTE-CARLO SIMULATION AND MEASUREMENT OF GAMMA RAY ATTENUA TION IN CONCRETE DTSTART;VALUE=DATE-TIME:20220322T153000Z DTEND;VALUE=DATE-TIME:20220322T154500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2256@indico.tlabs.ac.za DESCRIPTION:Speakers: JOSHUA PONDO (KENYATTA UNIVERSITY)\nGamma rays have high energy hence they are significantly used in irradiation of food items \, diagnosis in nuclear medicine\, tracing for radioactive substances like thorium\, radiotherapy\, sterilization of medical equipment\, and among o thers\, the detection of illicit trafficking of radioactive material acros s international borders. However\, gamma rays also pose great danger to in dividuals working within and around radiation facilities including the lin ear accelerators used in medicine\, nuclear power stations and the nuclear reactors. This is because when gamma rays is absorbed by living organisms \, it damages their cells causing delayed division\, reproductive failure and mutation among others. This calls for radiation protection for people working near radiation facilities. The study on gamma radiation attenuatio n through materials is important in Gamma ray shielding hence radiation pr otection. Most radiation facilities have thick concrete walls. This is bec ause it’s a cheap shielding material with good structural advantage. Thi s study employed the use of the GEANT4 Monte-Carlo program to simulate the gamma ray attenuation in concrete. Version ten of the GEANT4 package for Linux platform was used to simulate the linear attenuation coefficient of ordinary concrete for gamma ray photons of energy 662 keV and its mass att enuation coefficient for gamma ray photons within the energy range from 10 keV to 100 MeV. The simulated and the measured data were analyzed with th e ROOT program. A comparison was made between the GEANT4 simulated results \, the measured data\, the NIST XCOM simulated data and the published data . The findings from measurement indicated that the linear attenuation coef ficient of ordinary concrete is (0.182±0.006) cm-1 while the GEANT4 simul ated value is 0.179 cm-1. The half value layer of ordinary concrete was ob tained to be (3.81±0.13) cm and 3.87 cm for the measurement and the GEANT 4 simulation respectively. These research findings also showed that the me an free path of ordinary concrete is 5.59 cm and (5.49±0.18) cm for the s imulation and the measurement respectively. The variation of mass attenuat ion coefficient with energy from 10 keV to 100 MeV obtained from GEANT4 wa s consistent with the one obtained from XCOM program\, except at lower ene rgies where the photoelectric effect mass attenuation coefficient was inco nsistent. This was attributed to the adoption of different cross section d ata sources for the XCOM program and the GEANT4 program. These findings in dicated consistency in both the measured results\, the GEANT4 evaluated re sults\, the XCOM simulated results and the published data. The results val idated the use of the GEANT4 program for the simulation of gamma ray atten uation in materials.\n\nhttps://indico.tlabs.ac.za/event/109/contributions /2256/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2256/ END:VEVENT BEGIN:VEVENT SUMMARY:Recoil Kinematics in Radiative Energy Loss DTSTART;VALUE=DATE-TIME:20220322T160000Z DTEND;VALUE=DATE-TIME:20220322T161500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2253@indico.tlabs.ac.za DESCRIPTION:Speakers: Antonio Renecle (University of Cape Town)\nWe invest igate the behaviour of particle emission spectra in the large-$x$ region f ollowing a rigorous implementation of the kinematic constraints in the sim pler framework of a scalar field theory. We find that the small-$x$ kinema tic constraints in the simpler theory are identical to those implemented i n sophisticated QCD-based energy loss models\, but that the exact large-$x $ kinematics are more complicated than those implemented in those same QCD -based energy loss models. We compute the multiplicity distributions for v arious values of the parent parton energy and see that our spectra respect energy conservation by smoothly vanishing outside the classically allowed 0 < $x$ < 1 region. We repeat the calculation for the emission of a spin- 1 particle and similarly observe that the spectra have support strictly wi thin kinematically allowed regions.\n\nhttps://indico.tlabs.ac.za/event/10 9/contributions/2253/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2253/ END:VEVENT BEGIN:VEVENT SUMMARY:A Study to the Mass Effect due to Variation of Particle Type on th e Femtoscopic Correlation Using Therminator2 Event Generator DTSTART;VALUE=DATE-TIME:20220322T154500Z DTEND;VALUE=DATE-TIME:20220322T160000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2268@indico.tlabs.ac.za DESCRIPTION:Speakers: Muhammad Ibrahim Abdulhamid Elsayed (Faculty of Scie nce\, Tanta University)\nStudying the femtoscopic correlation of elementar y particles resulting from heavy-ion collisions introduces an identificati on of the particle's space-time characteristics after the collision\, in a ddition to the determination of how strong particles can interact. In this study\, I try to present a femtoscopic analysis of particles with identic al charges to check the effect of mass on the correlation factor through T HERMINATOR2 which is used to generate events for proton-lead collisions at a center of mass energy of 5.02 TeV.\n\nhttps://indico.tlabs.ac.za/event/ 109/contributions/2268/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2268/ END:VEVENT BEGIN:VEVENT SUMMARY:Probing 2HDM+S with MeerKAT Galaxy Cluster Legacy Survey data DTSTART;VALUE=DATE-TIME:20220322T151500Z DTEND;VALUE=DATE-TIME:20220322T153000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2212@indico.tlabs.ac.za DESCRIPTION:Speakers: Natasha Lavis (University of the Witwatersrand)\nDar k matter is believed to constitute the majority of the matter content of t he universe\, but virtually nothing is known about its nature. Physical pr operties of a candidate particle can be probed via indirect detection by o bserving the decay and/or annihilation products. While this has previously been done primarily through gamma-ray studies\, the increased sensitivity of new radio interferometers means that searches via the radio bandwidth are the new frontrunners. MeerKAT's high sensitivity\, ranging from 3 $\\m u$Jy beam$^{-1} $ for an 8 arcsecond beam to 10 $\\mu$Jy beam$^{-1} $ for an 15 arcsecond beam\, make it a prime candidate for radio dark matter sea rches. Using MeerKAT Galaxy Cluster Legacy Survey (MGCLS) data to obtain d iffuse synchrotron emission within galaxy clusters\, we are able to probe the properties of a dark matter model. In this work we consider both gener ic WIMP annihilation channels as well as the 2HDM+S model. The latter was developed to explain various anomalies observed in Large Hadron Collider ( LHC) data from runs 1 and 2. The use of public MeerKAT data allows us to p resent the first WIMP dark matter constraints produced using this instrume nt.\n\nhttps://indico.tlabs.ac.za/event/109/contributions/2212/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2212/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of muon-induced background in Double Chooz neutrino oscillat ion experiment. DTSTART;VALUE=DATE-TIME:20220322T150000Z DTEND;VALUE=DATE-TIME:20220322T151500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2271@indico.tlabs.ac.za DESCRIPTION:Speakers: Kenny KALE SAYI ()\nThe Double Chooz experiment is a reactor antineutrino disappearance experiment located on the site of the Chooz nuclear power plant in the Ardennes region in France. The principal aim of the experiment is a high precision measurement of the oscillation a mplitude sin2 2θ13 of the antineutrinos emitted from the two reactor core s of the Chooz power plant. The robustness and accuracy of this measuremen t depends strongly on a precise knowledge of the rates and spectral shapes of the backgrounds that contaminate the antineutrinos selection over the neutrino oscillation expected region. We study the muon induced background in the Double Chooz experiment. Indeed\, cosmic muons crossing the detect ors or interacting in the neighborhood constitute the main source of backg round events encountered in Double Chooz. Dedicated identification techniq ues have been developed ton tag each of these backgrounds and\, consequent ly\, the associated spectral shapes and rates have been determined. The va lues obtained in our work serve as inputs in the final fit whence the θ13 value is extracted. The latest measurement released by the Double Chooz c ollaboration is sin^2 θ13 = 0.119 ± 0.016.\n\nhttps://indico.tlabs.ac.za /event/109/contributions/2271/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2271/ END:VEVENT BEGIN:VEVENT SUMMARY:Exploring the Impact of Magnetic field on Core-Collapse Supernova Neutrino Light Curves Detection. DTSTART;VALUE=DATE-TIME:20220322T141500Z DTEND;VALUE=DATE-TIME:20220322T143000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2236@indico.tlabs.ac.za DESCRIPTION:Speakers: Meriem Bendahman (Faculty of Sciences\, Mohammed V U niversity\, Rabat - Laboratoire Astroparticules et Cosmologie\, Universit é de Paris\, Paris)\nThe time profile of neutrino emissions from core-col lapse supernovae contains unique information about the dynamics of the col lapsing stars and the behavior of particles in dense en- vironments. The o bservation of neutrinos from the SN1987A supernova\, in the Large Magellan ic Cloud\, marked the beginning of neutrino astronomy. To date\, no other supernova neutrino obser- vation has been made. It is therefore essential to investigate the impact of the supernova properties on the neutrino ligh t curves expected in current and future experiments. In this contribution\ , we study the effect of the magnetic field on the neutrino observations. For certain massive supernovae\, strong magnetic fields are expected to ch ange the star’s collapse rate\, and thus modulate neutrino production. H ere\, we consider the impact of different magnetic field topologies on neu trino light curves which would be observed at the KM3NeT\, DUNE\, and Dark Side experiments. We iden- tify areas of complementarity between these thr ee experiments and discuss how to combine their observations to allow to d iscriminate between different supernova models.\n\nhttps://indico.tlabs.ac .za/event/109/contributions/2236/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2236/ END:VEVENT BEGIN:VEVENT SUMMARY:The lambda hyperon and the hyperon puzzle DTSTART;VALUE=DATE-TIME:20220322T131500Z DTEND;VALUE=DATE-TIME:20220322T133000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2235@indico.tlabs.ac.za DESCRIPTION:Speakers: Wazha German ()\nNeutron stars provide unique condit ions to study cold dense nuclear matter at extreme densities. Due to these extreme conditions additional hadronic degrees of freedom are expected to be populated\, including hyperons. This talk will focus on the influence of hyperons on the neutron star equation of state. In particular the cont ribution of the lambda hyperon will be discussed\, as a first approximatio n to describing exotic neutron star equations of state. The system under c onsideration is where the strong nuclear force is described by the exchang e of mesons and applying the relativistic mean field theory to study dense nuclear matter. As expected\, the inclusion of the lambda hyperon softens the neutron star equation of state (EoS). A softer EoS will reduce the ma ximum mass attainable by the modeled neutron star with such EoS. While hyp erons are certainly not unexpected in high density systems\, but there pre sence seems to be contradicted by observations of high mass neutron stars . This contradiction is known as the ``hyperon puzzle''. The expected inf lux of observational data from massive new radio-telescopes like the Squar e Kilometer Array (SKA) will provide observations that can be supported an d evolve theoretical models of nuclear matter. Therefore\, the study of hy peronic matter is not only relevant to nuclear theory\, but also locally t o Botswana as an African partner country of the SKA.\n\nhttps://indico.tla bs.ac.za/event/109/contributions/2235/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2235/ END:VEVENT BEGIN:VEVENT SUMMARY:ALP-Photon interaction in magnetized environment of a compact star DTSTART;VALUE=DATE-TIME:20220322T140000Z DTEND;VALUE=DATE-TIME:20220322T141500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2249@indico.tlabs.ac.za DESCRIPTION:Speakers: Ankur Chaubey (Banaras Hindu University\, Varanasi\, India)\nThe spin zero\, very light bosons like scalar (dilaton) and pseu doscalar (axion) collectively grouped into the term axion like particle (A LP). Dilatons are postulated in extended theory of standard model of part icles to cure the scale invariance of the field theory while the axions ha ve been introduced to resolve the $U_{A}(1)$ anomaly in Quantum field the ory. These ALPs also show their presence in higher dimensional theories a s K K particle in Kaluza Klein theory\, moduli in String theory and chamel eons in cosmology. \n \n ALPs hold a special place amongst the possib le candidates of dark matter therefore their detection as well as identifi cation have become a part of the central theme of particles detector pro jects. The direct experimental detection of these particles in ground base d laboratories are still far from reach of existing--sensitivity of the detectors. However recent advancements in the area of their indirect detec tion by searching the imprints of their interactions with non-thermal phot ons coming through the magnetosphere of the compact stars\, motivates to carry out the investigations into that direction. Previously the similar kind of investigations had been practiced by several groups [1]-[5] on r elevant issues\, however our investigation includes another non-trivial as pect that has not been effectively considered important in such investiga tions\; that is background dependence of the mixing dynamics of these part icles (dilaton/axion) with electromagnetic radiation. \nIn this work we fo cus on evaluating statistically good signal strength of spectro-polarime tric variables like ellipticity angle\, linear polarization angle and deg ree of linear polarization of the photons interacted with ALP using the St okes parameters.\n It has been shown that the obtained magnitudes of the v ariables fall into the detectable range of the detectors that would be hel pful in designing the future detectors. In addition to that we have also looked for the implications of this dimension five interactions to explain the anomalous behaviour in luminosity time relation of stars like Betelg euse. \n\n**Bibliography**\n\n[1] J. P. Conlon\, and M. C. David Marsh\,\n Excess Astrophysical Photons from a 0.1-1 keV Cosmic Axion Background\,\n Phys. Rev. Lett. 111\, 151301 (2013).\n\n[2] L. Maiani\, R. Petronzio\, and E. Zavattini\, \nEffects of nearly massless\, spin-zero particles on light propagation in a magnetic field\, \nPhys. Lett. B 175\, 359 (1986).\ n\n[3] G. Raffelt\, and L. Stodolsky\, \nMixing of the photon with low-mas s particles\,\n Phys. Rev. D 37\, 1237-1249 (1988).\n\n[4] N. J. Craig\, a nd S. Raby\, Modulino dark matter and teh INTEGRAL 511 keV Line \narXiv: 0908.1842v2.\n\n[5] P. Sikivie\, \nInvisible Axion Search Methods\, \nRev. Mod. Phys. 93\, 015004 (2021).\n\nhttps://indico.tlabs.ac.za/event/109/c ontributions/2249/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2249/ END:VEVENT BEGIN:VEVENT SUMMARY:Thermodynamic analysis of the BTZ black hole in f(R) gravity DTSTART;VALUE=DATE-TIME:20220322T134500Z DTEND;VALUE=DATE-TIME:20220322T140000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2243@indico.tlabs.ac.za DESCRIPTION:Speakers: Asmaa Shalaby (Benha University)\nThe classical Eins tein equations in 2+1 dimensions have a black hole solution with a negativ e cosmological constant. Its solutions are asymptotically anti-de Sitter r ather than asymptotically flat. In the context of f(R) gravity theory\, we attempt to investigate the thermodynamics of non-rotating Banados\, Teit elboim\, and Zanelli (BTZ) black holes. The Lagrangian will be modified d ue to the non-rotating BTZ BH metric\, in turn\, the associated area law o f entropy will be modified too. In addition\, the heat capacity and the ev aporation time will be examined.\n\nhttps://indico.tlabs.ac.za/event/109/c ontributions/2243/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2243/ END:VEVENT BEGIN:VEVENT SUMMARY:Thermodynamics of magnetised dense neutron-rich matter DTSTART;VALUE=DATE-TIME:20220322T133000Z DTEND;VALUE=DATE-TIME:20220322T134500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2237@indico.tlabs.ac.za DESCRIPTION:Speakers: Jacobus Diener (Botswana International University of Science and Technology)\nA neutron star is one of the possible end states of a massive star. It is compressed by gravity and stabilized by the nucl ear degeneracy pressure. Despite its name\, the composition of these objec ts are not exactly known. However\, from the inferred densities\, neutrons will most likely compose a significant fraction of the star’s interior. While all neutron stars are expected to have a magnetic field\, some neut ron stars (``magnetars'') are much more highly magnetised than others: the inferred magnetar surface magnetic field is between $10^{14}$ to $10^{15} $ gauss. While neutron stars are macroscopic objects\, due to the extreme value of the stars’ energy\, pressure\, and magnetic field the thermodyn amics on the microscopic scale can be imprinted on the star’s large scal e behaviour. This talk will focus on describing the thermodynamics of mag netised dense neutron and neutron-rich matter\, its equation of state and explore conditions of a possible ferromagnetic state\, contributions from the magnetised vacuum\, as well as possible observational implications the reof for neutron stars.\n\nhttps://indico.tlabs.ac.za/event/109/contributi ons/2237/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2237/ END:VEVENT BEGIN:VEVENT SUMMARY:Lorentz Invariance Violation tests in astroparticle physics DTSTART;VALUE=DATE-TIME:20220322T130000Z DTEND;VALUE=DATE-TIME:20220322T131500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2228@indico.tlabs.ac.za DESCRIPTION:Speakers: Hassan Abdalla (Omdurman Islamic University - Sudan) \nAt energies approaching the Planck energy scale $10^{19}$ GeV\, several quantum-gravity theories predict that familiar concepts such as Lorentz sy mmetry can be broken. Such extreme energies are currently unreachable by e xperiments on Earth\, but for photons traveling over cosmological distance s the accumulated deviations from the Lorentz symmetry may be measurable u sing the Cherenkov Telescope Array (CTA). Therefore\, current and future g eneration of gamma-ray experiments are expected to improve our understandi ng of fundamental physics.\n\nhttps://indico.tlabs.ac.za/event/109/contrib utions/2228/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2228/ END:VEVENT BEGIN:VEVENT SUMMARY:KM3NeT: Status and perspectives for neutrino astronomy from the Me V to the PeV DTSTART;VALUE=DATE-TIME:20220321T134500Z DTEND;VALUE=DATE-TIME:20220321T140000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2240@indico.tlabs.ac.za DESCRIPTION:Speakers: Andrew Chen (University of the Witwatersrand)\nKM3Ne T is a multi-purpose neutrino observatory currently being deployed at the bottom of the Mediterranean Sea. It consists of two detectors: ORCA and AR CA (for Oscillation and Astroparticle Research with Cosmics in the Abyss). ARCA will instrument 1 Gton of seawater\, with the primary goal of detect ing cosmic neutrinos with energies between several tens of GeV and PeV. Du e to its position in the Northern Hemisphere\, ARCA will provide an optima l view of the Southern sky including the Galactic Center. ARCA currently h as 8 detection units fully operating out of an eventual planned total of 2 30. ORCA is a smaller (~ few Mtons) and denser array\, optimized for the d etection of atmospheric neutrinos in the 1 - 100 GeV range. It can also st udy low-energy neutrino astronomy\, such as MeV-scale core-collapse supern ovae. ORCA currently has 10 detection units fully operating out of an even tual planned total of 115. I will report on the current status and recent discoveries of ARCA and ORCA as well as a timeline for future developments .\n\nhttps://indico.tlabs.ac.za/event/109/contributions/2240/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2240/ END:VEVENT BEGIN:VEVENT SUMMARY:MeerKAT and dark matter DTSTART;VALUE=DATE-TIME:20220321T164500Z DTEND;VALUE=DATE-TIME:20220321T170000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2230@indico.tlabs.ac.za DESCRIPTION:Speakers: Geoff Beck (University of the Witwatersrand)\nRadio indirect detection has evolved into a promising approach to probe the natu re of dark matter. This will only be enhanced by the construction of the f ull SKA. In the mean-time\, MeerKAT’s potential as a dark matter detecto r has largely been ignored. In this work we will present simulations of th e sensitivity of MeerKAT to diffuse radio emissions and apply them the dwa rf galaxy Reticulum II to determine the potential of MeerKAT to probe the WIMP parameter space. We demonstrate that\, by leveraging its angular reso lution\, MeerKAT has the potential to produce constraints tighter than Fer mi-LAT results in dwarf spheroidal galaxies.\n\nhttps://indico.tlabs.ac.za /event/109/contributions/2230/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2230/ END:VEVENT BEGIN:VEVENT SUMMARY:Solar constraints on captured electrophilic dark matter DTSTART;VALUE=DATE-TIME:20220321T153000Z DTEND;VALUE=DATE-TIME:20220321T154500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2219@indico.tlabs.ac.za DESCRIPTION:Speakers: Debajit Bose (IIT Kharagpur)\nDark matter captured b y interaction with electrons inside the Sun may annihilate via a long-live d mediator to produce observable gamma-ray signals. We utilize solar gamma -ray flux measurements from the Fermi Large Area Telescope and High Altitu de Water Cherenkov observatory to put bounds on the dark matter electron s cattering cross-section. We find that our limits are four to six orders of magnitude stronger than the existing limits for dark matter masses rangin g between GeV to PeV scale.\n\nhttps://indico.tlabs.ac.za/event/109/contri butions/2219/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2219/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for Magnetic Monopoles with ten years of ANTARES data DTSTART;VALUE=DATE-TIME:20220321T143000Z DTEND;VALUE=DATE-TIME:20220321T144500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2218@indico.tlabs.ac.za DESCRIPTION:Speakers: Jihad Boumaaza (University Mohamed V in Rabat)\nThis work presents an updated search for magnetic monopoles using data taken w ith the ANTARES neutrino telescope over a period of 10 years (January 2008 to December 2017). In accordance with some grand unification theories\, m agnetic monopoles were created during the phase of symmetry breaking in th e early Universe\, and accelerated by galactic magnetic fields. As a conse quence of their high energy\, they could cross the Earth and emit a signif icant signal in a Cherenkov-based telescope like ANTARES\, for appropriate mass and velocity ranges. This analysis uses a run-by-run simulation stra tegy\, as well as a new simulation of magnetic monopoles taking into accou nt the Kasama\, Yang and Goldhaber model for their cross section with matt er. The results obtained for relativistic magnetic monopoles with β=v⁄c ≥ 0.55\, where v is the magnetic monopole velocity and c the speed of l ight in vacuum\, will be presented.\n\nhttps://indico.tlabs.ac.za/event/10 9/contributions/2218/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2218/ END:VEVENT BEGIN:VEVENT SUMMARY:Thermal production of early dark matter from van der Waals fluid DTSTART;VALUE=DATE-TIME:20220321T154500Z DTEND;VALUE=DATE-TIME:20220321T160000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2209@indico.tlabs.ac.za DESCRIPTION:Speakers: M. Bousder (MOHAMMED V UNIVERSITY IN RABAT)\nWe pres ent a new paradigm for scalar dark matter (DM) particles production in the early Universe. We show the appearance of a new quadratic potential after inflation. This result is due to the stabilization of scalar fields parti cles. In this case\, the mass of this field increases and becomes a candid ate for dark matter. We show the van der Waals equation of state for DM\, which leads to the Boltzmann equation and the DM number density. We establ ish the correspondence between the thermodynamic variables needed to descr ibe simple systems by the van der Waals gas. Particularly\, we obtain the relationship between the DM cross-section and the redshifts. Finally\, we discuss the local stability of dark matter by the heat capacity.\n\nhttps: //indico.tlabs.ac.za/event/109/contributions/2209/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2209/ END:VEVENT BEGIN:VEVENT SUMMARY:Searching for new physics during gravitational waves propagation DTSTART;VALUE=DATE-TIME:20220321T141500Z DTEND;VALUE=DATE-TIME:20220321T143000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2222@indico.tlabs.ac.za DESCRIPTION:Speakers: Leïla Haegel (APC Laboratory (Uni.Paris / CNRS))\nT he direct detection of gravitational waves opened an unprecedented channel to probe fundamental physics. Proposed extensions of our current theories predict a dispersion of the gravitational waves during their propagation\ , leading to a modification of the signals observed by ground-based interf erometers compared to their predictions from general relativity. In this t alk\, I present several analyses probing different alternative models of g ravitation with various observables. Using the multimessenger events consi sting of gravitational waves and their electromagnetic counterpart\, the s peed of gravity is measured by comparing the arrival time of the two signa ls while extra dimensions and scalar-tensor theories are constrained from the comparison of the luminosity distance inferred independently from both signals. Relying only on gravitational wave signals\, a large class of pr oposed theories\, including as the existence of massive graviton\, predict a frequency-dependent dispersion of the gravitational waves breaking loca l CPT and/or Lorentz symmetry. Constraints on the modified dispersion rela tion and effective field theories coefficients are obtained from the analy sis of the third LIGO-Virgo detections catalog.\n\nhttps://indico.tlabs.ac .za/event/109/contributions/2222/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2222/ END:VEVENT BEGIN:VEVENT SUMMARY:Correlation between IceCube neutrinos and X-ray flaring blazars DTSTART;VALUE=DATE-TIME:20220321T140000Z DTEND;VALUE=DATE-TIME:20220321T141500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2246@indico.tlabs.ac.za DESCRIPTION:Speakers: Matthew Fu (Bishop Watterson High School)\, Timothy Govenor (Bishop Watterson High School)\, Quentin King (Bishop Watterson Hi gh School)\nGamma-ray bright blazars are beginning to emerge as a very pla usible \nsource of at least some of the very-high-energy neutrinos detecte d \nby IceCube. Most searches for a correlation between blazars and neutri no \nevents have so far focused on gamma-ray flaring blazars\, motivated b y \nthe fact that very-high-energy gamma-rays are co-produced with neutrin os \nif neutrinos are produced through photo-pion interactions of relativi stic \nprotons with dense target photon fields. However\, the same target photon \nfields also act as a source of gamma-gamma opacity\, leading to t he development \nof electromagnetic cascades. The energy of the co-produce d photons is \ntherefore more likely to emerge in the soft gamma-ray to X- ray regime \ninstead of high-energy and very-high-energy gamma-rays. We ar e therefore\nconducting a systematic search for a correlation between IceC ube Gold and \nBronze alerts and X-ray flaring blazars\, utilizing the Swi ft-XRT blazar \nmonitoring program. First preliminary results of this sear ch will be \npresented.\n\nhttps://indico.tlabs.ac.za/event/109/contributi ons/2246/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2246/ END:VEVENT BEGIN:VEVENT SUMMARY:Deflection angle of light rays by accelerating black holes with co smological constant DTSTART;VALUE=DATE-TIME:20220321T160000Z DTEND;VALUE=DATE-TIME:20220321T161500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2196@indico.tlabs.ac.za DESCRIPTION:Speakers: Hajar BELMAHI (University Mohammed V)\nUsing the Gau ss-Bonnet formalism\, the deflection angle of light rays by accelerating b lack holes is computed and investigated. The effect of the accelerating pa rameter is inspected. Then\, the influence of the cosmological effect is a lso discussed.\n\nhttps://indico.tlabs.ac.za/event/109/contributions/2196/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2196/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for nuclearites in nine years of ANTARES data DTSTART;VALUE=DATE-TIME:20220321T144500Z DTEND;VALUE=DATE-TIME:20220321T150000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2248@indico.tlabs.ac.za DESCRIPTION:Speakers: Mohammed Bouta (Mohamed First University in Oujda)\n Nuclearites are hypothetical heavy particles composed by roughly equal pro portions of up\, down and strange quarks. These particles loose their ener gy by atomic collisions and they induce visible light in transparent mediu ms through black-body radiation from a shock wave.\n\nANTARES is a neutrin os telescope running at 2475 meters under water in the Mediterranean Sea. Nuclearites with a masses $\\geq 4 \\times 10^{13}$ GeV/c$^2$ are able to generate a sufficient amount of visible light to be detected. The nucleari tes with a masses $\\leq 10^{22}$ GeV/$c^2$ are not able to cross the Eart h diameter\, however. In this analysis\, we consider a down-going flux of nuclearites with masses ranging from $ 4 \\times 10^{13}$ to $10^{16}$ GeV /c$^2$ penetrating into the Earth with galactic velocities ($\\beta=10^{-3 }$).\n\nhttps://indico.tlabs.ac.za/event/109/contributions/2248/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2248/ END:VEVENT BEGIN:VEVENT SUMMARY:Dark Matter Direct and Indirect Detection DTSTART;VALUE=DATE-TIME:20220321T161500Z DTEND;VALUE=DATE-TIME:20220321T163000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2251@indico.tlabs.ac.za DESCRIPTION:Speakers: houria cherief (phd student)\ndark matter is an esse ntial ingredient for understanding the recipe of the universe's creation. Since it cannot be made of any of the usual standard model particles\, the refore the construction of particle-physics models for dark matter has bec ome a huge industry\, accelerated quite recently by many studies. The tech niques needed to detect these different signatures of dark matter are comp osed of two major direct and indirect detection. this work intended to pro vide a brief review of dark matter for the newcomer to the subject beginni ng with a discussion of the astrophysical evidence for dark matter. Then t he standard weakly interacting massive particle (WIMP) scenario and detect ion techniques are reviewed\, as well as mentioning some alternatives (axi ons and sterile neutrinos).\n\nhttps://indico.tlabs.ac.za/event/109/contri butions/2251/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2251/ END:VEVENT BEGIN:VEVENT SUMMARY:Optical observations of gamma-ray binaries with SALT DTSTART;VALUE=DATE-TIME:20220323T101500Z DTEND;VALUE=DATE-TIME:20220323T104500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2287@indico.tlabs.ac.za DESCRIPTION:Speakers: Brian van Soelen (University of the Free State)\nht tps://indico.tlabs.ac.za/event/109/contributions/2287/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2287/ END:VEVENT BEGIN:VEVENT SUMMARY:Multi-messenger Astronomy with high-energy Neutrinos DTSTART;VALUE=DATE-TIME:20220323T104500Z DTEND;VALUE=DATE-TIME:20220323T111500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2286@indico.tlabs.ac.za DESCRIPTION:Speakers: Anna Franckowiak (Ruhr-University Bochum)\nhttps:// indico.tlabs.ac.za/event/109/contributions/2286/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2286/ END:VEVENT BEGIN:VEVENT SUMMARY:Formation and the Evolution of Large-Scale Structure in the Univer se DTSTART;VALUE=DATE-TIME:20220322T080000Z DTEND;VALUE=DATE-TIME:20220322T083000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2285@indico.tlabs.ac.za DESCRIPTION:Speakers: Jeltema Tesla (University of California\, Santa Cru z)\nhttps://indico.tlabs.ac.za/event/109/contributions/2285/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2285/ END:VEVENT BEGIN:VEVENT SUMMARY:Indirect DM search and Physics Beyond the Standard Model DTSTART;VALUE=DATE-TIME:20220322T090000Z DTEND;VALUE=DATE-TIME:20220322T093000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2283@indico.tlabs.ac.za DESCRIPTION:Speakers: Gabrijela Zaharijas (Center for Astrophysics and Co smology University of Nova Gorica)\nhttps://indico.tlabs.ac.za/event/109/ contributions/2283/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2283/ END:VEVENT BEGIN:VEVENT SUMMARY:Dark matter in the Universe DTSTART;VALUE=DATE-TIME:20220321T090000Z DTEND;VALUE=DATE-TIME:20220321T093000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2282@indico.tlabs.ac.za DESCRIPTION:Speakers: Francoise Combes (Collège de France et Observatoir e de Paris)\nhttps://indico.tlabs.ac.za/event/109/contributions/2282/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2282/ END:VEVENT BEGIN:VEVENT SUMMARY:HyperK status and prospects DTSTART;VALUE=DATE-TIME:20220321T103000Z DTEND;VALUE=DATE-TIME:20220321T110000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2281@indico.tlabs.ac.za DESCRIPTION:Speakers: Francesca Di Lodovico (King's College London )\nhtt ps://indico.tlabs.ac.za/event/109/contributions/2281/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2281/ END:VEVENT BEGIN:VEVENT SUMMARY:Future Colliders DTSTART;VALUE=DATE-TIME:20220323T083000Z DTEND;VALUE=DATE-TIME:20220323T091500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2280@indico.tlabs.ac.za DESCRIPTION:Speakers: Xinchou Lou (Institute of High Energy Physics\, Beij ing)\, Yaquan Fang (Institute of High Energy Physics)\nhttps://indico.tlab s.ac.za/event/109/contributions/2280/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2280/ END:VEVENT BEGIN:VEVENT SUMMARY:Anomalies in Particle Physics DTSTART;VALUE=DATE-TIME:20220322T110000Z DTEND;VALUE=DATE-TIME:20220322T113000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2279@indico.tlabs.ac.za DESCRIPTION:Speakers: Andreas Crivellin (PSI and University of Zurich)\nht tps://indico.tlabs.ac.za/event/109/contributions/2279/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2279/ END:VEVENT BEGIN:VEVENT SUMMARY:Physics beyond the Standard Model DTSTART;VALUE=DATE-TIME:20220322T100000Z DTEND;VALUE=DATE-TIME:20220322T103000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2278@indico.tlabs.ac.za DESCRIPTION:Speakers: Abdelhak Djouadi (University of Granada\, Spain)\nht tps://indico.tlabs.ac.za/event/109/contributions/2278/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2278/ END:VEVENT BEGIN:VEVENT SUMMARY:Jet substructure and boosted top quark jet tagging DTSTART;VALUE=DATE-TIME:20220322T163000Z DTEND;VALUE=DATE-TIME:20220322T164500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2259@indico.tlabs.ac.za DESCRIPTION:Speakers: Azzeddine Benhamida (University of Oran 1 Ahmed ben bella)\nWe discuss varied jet taggers that identify boosted hadronic top q uark jets.\nThese tagging approaches mainly uses jet algorithms to reconst ruct the kinematics\nof fat jets (i.e. jets that includes heavy particles) \, by analyzing their subjet\nconstituents. We also review the currently a vailable experimental results as well\nas the crucial QCD aspects with rel iable theoretical and algorithmic backgrounds\nthat are useful for develop ing and enhancing these taggers.\n\nhttps://indico.tlabs.ac.za/event/109/c ontributions/2259/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2259/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurements of W boson properties at √s = 5 and 13 TeV with the ATLAS detector at the LHC. DTSTART;VALUE=DATE-TIME:20220322T164500Z DTEND;VALUE=DATE-TIME:20220322T170000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2245@indico.tlabs.ac.za DESCRIPTION:Speakers: hicham atmani ()\nAfter the discovery of the W and Z bosons at the Super Proton Synchrotron (SPS) at CERN\, particles responsi ble for weak interactions\, the efforts have been geared towards measuring their properties. A precise measurement of the W boson properties remains a major test for the validation of the standard model.\n\nIn this present ation\, the measurement of the W boson transverse momentum $p^{T}_{W}$ and the differential cross sections are described. Using low pile-up data set \, collected with low number of interactions per bunch crossing\, by the ATLAS detector in 2017 and 2018.\n\n* $\\textbf{Measurement of the transve rse momentum distribution}$: One of the most important theoretical sources of uncertainties in the measurement of the W-boson mass\, is the extrapol ation of the $p^{T}$ distribution from Z boson to W-boson (≈ 6 MeV)\, a direct measurement of $p^{T}_{W}$ would avoid such an extrapolation and th e corresponding theoretical modelling uncertainty. \n\n\n* $\\textbf{Measu rement of the differential cross sections}$: The measurement of the differ ential cross sections for the $W$ boson provides stringent tests of the Q CD theory\, and is crucial for a deep understanding and modelling of QCD i nteractions. Also\, the rapidity dependence of the W boson production in t he Drell–Yan process provides constraints on the parton distribution fu nctions (PDFs)\, which are currently the dominant uncertainty source in th e W mass measurement (9.2 MeV).\n\nsource: https://tel.archives-ouvertes. fr/tel-03224873\n\nhttps://indico.tlabs.ac.za/event/109/contributions/2245 / LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2245/ END:VEVENT BEGIN:VEVENT SUMMARY:On 't Hooft lines and Lax operators of $SO_{2N}$ type DTSTART;VALUE=DATE-TIME:20220322T141500Z DTEND;VALUE=DATE-TIME:20220322T143000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2241@indico.tlabs.ac.za DESCRIPTION:Speakers: Youssra Boujakhrout (LPHE-MS\, Science Faculty\, Moh ammed V University in Rabat\, Morocco)\nThe four dimensional Chern Simons topological gauge theory represents a rich framework allowing to study two -dimensional integrable systems using line and surface defects and Feynman diagrams computations. Relying on this "Gauge/Bethe ansatz" correspondenc e\, one can recover interesting results of the integrable models and gener ate new ones without reference to the traditional algebraic techniques. Fo r example\, the study of the intrinsic properties of interacting Wilson an d 't Hooft line defects in the 4DCS theory yields the oscillator realisati on of the Lax operator verifying the RLL equation of integrability. This s tudy focuses on the 4DCS theory with invariance given by the $SO_{2N}$ gau ge group\, which allows to construct the Lax operator associated to the QQ representation of an XXX spin chain with $so_{2N}$ symmetry. This also al lows to interprete the oscillator degrees of freedom in terms of algebras decomposition and field bundles charges.\n\nhttps://indico.tlabs.ac.za/eve nt/109/contributions/2241/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2241/ END:VEVENT BEGIN:VEVENT SUMMARY:Weinberg's factor from helicity constraint DTSTART;VALUE=DATE-TIME:20220322T150000Z DTEND;VALUE=DATE-TIME:20220322T151500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2239@indico.tlabs.ac.za DESCRIPTION:Speakers: Fanomezantsoa Arlivah ANDRIANTSARAFARA ()\nScatterin g amplitudes connect theoretical descriptions to experimental predictions. Low energy terms of the scattering amplitude tend to factorize from the h igh energy. Different methods have already been established to understand the mechanism of such factorization\, Weinberg’s theorem. With regard to the Weinberg soft factor\, calculations have already shown that this fact or has a universal character. In this talk\, we show that it is possible t o calculate this factor independently from the scattering amplitude based on the Wigner constraint. We also show that such constraint leads us to a system partial differential equation to simplify the construction of the W einberg’s soft factor for the case of one particle or two particles.\n\n https://indico.tlabs.ac.za/event/109/contributions/2239/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2239/ END:VEVENT BEGIN:VEVENT SUMMARY:Searches for new physics using the top-quark pair invariant mass d istribution in proton-proton collisions at √s=13 TeV DTSTART;VALUE=DATE-TIME:20220322T160000Z DTEND;VALUE=DATE-TIME:20220322T161500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2234@indico.tlabs.ac.za DESCRIPTION:Speakers: Souad Batlamous ()\nA search for new heavy particles that decay into top-quark pairs is performed in proton-proton collisions at the LHC at a center-of-mass energy of 13 TeV using data collected by th e ATLAS experiment during the years 2015 and 2018. Events consistent with top-quark pair production are selected by requiring a single isolated char ged lepton\, missing transverse momentum and jet activity compatible with a hadronic top-quark decay. Jets identified as likely to contain b-hadrons are required to reduce the background from other Standard Model (SM) proc esses. The observed invariant mass spectrum of the candidate top-quark pai rs is investigated to seek for any significant deviation from the SM backg round expectation.\n\nhttps://indico.tlabs.ac.za/event/109/contributions/2 234/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2234/ END:VEVENT BEGIN:VEVENT SUMMARY:The comparison study of the ratio between $t\\overline{t}\\gamma$ and $t\\overline{t}$ in the $e\\mu$ channel at 13 TeV using the ATLAS dete ctor DTSTART;VALUE=DATE-TIME:20220322T161500Z DTEND;VALUE=DATE-TIME:20220322T163000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2257@indico.tlabs.ac.za DESCRIPTION:Speakers: Thuso Mathaha (University of the Witwatersrand)\nWit h the goal of increasing the precision of NLO QCD predictions for the $pp\ \rightarrow t\\overline{t}\\gamma$ process in the di-lepton top quark deca y channel we present a study of the ratio of top quarks together with a ph oton to the top quark pair. Fully realistic LO and NLO computations for $t \\overline{t}\\gamma$ and $t\\overline{t}$ production are employed. Events with exactly one electron and one muon\, and at least two jets with one o f them being a $b$-tagged are selected. Multiple observables are related w ith Monte Carlo simulations at leading-order and next-to-leading-order the oretical calculations. The variables include photon kinematic variables\, angular separation between the two leptons\, and angular variables related to the photon and the leptons.\n\nhttps://indico.tlabs.ac.za/event/109/co ntributions/2257/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2257/ END:VEVENT BEGIN:VEVENT SUMMARY:Extracting and Analysing Data from Detector Control Systems at ATL AS Experiment for Bad Channelling of High Voltage and Low Voltage Power Su pplies. DTSTART;VALUE=DATE-TIME:20220323T154000Z DTEND;VALUE=DATE-TIME:20220323T155000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2220@indico.tlabs.ac.za DESCRIPTION:Speakers: Sanele Scelo Sanele ()\nTile-in-One (TiO) is web pla tform to combine all web based offline data quality tools of ATLAS Tile Ca lorimeter in one web interface. This system is implemented a series of sma ll web applications with main gateway\, the applications are called plugin s. Plugins run in thier own separate virtual machine to avoid interference and increase platform stability. The aim of this project is to extract da ta from Detector Control System (DCS) of the ATLAS Experiment and use TiO web platform for visualization and analysis of the data in order to observ e behaviour of High volytage and Low voltage power supplies. The data was extracted on the DDV server in a form of text file then converted to comma separated values (csv) file in order to be visualized in the form of plot s using plotly.js library. A detailed results for the analysis of the dat a will be further discussed.\n\nhttps://indico.tlabs.ac.za/event/109/contr ibutions/2220/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2220/ END:VEVENT BEGIN:VEVENT SUMMARY:Upgrades of the ATLAS muon spectrometer with new small-diameter dr ift tube chambers DTSTART;VALUE=DATE-TIME:20220323T134500Z DTEND;VALUE=DATE-TIME:20220323T140000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2216@indico.tlabs.ac.za DESCRIPTION:Speakers: Ali El Moussaouy (Universite Hassan II\, Ain Chock ( MA))\nThe goals of the upgrades of the ATLAS Muon Spectrometer with new sm all-diameter Muon Drift Tube Chambers (so-called sMDT) are to make room to install new triple-Resistive Plate Chambers (tRPC) to increase the trigge r efficiency in the inner barrel muon region and to improve the rate capab ility of the muon chambers in the high background regions corresponding to the HL-LHC project. As a pilot project for the whole replacement of the M DT chambers in the small azimuthal sectors of the barrel inner layer (so-c alled BIS1-6) by new sMDT-RPC detectors in the long shutdown 3 (LS3)\, 8 N ew small diameter (15 mm) Muon Drift Tube chambers (so-called sMDT BIS7A) have been installed in the long shutdown 2 (LS2) in the transition region between Barrel and Endcap of Muon spectrometer 1 < |η| < 1.3. The Author will present an overview of the installation and read-out electronics of t he new sMDT BIS7A chambers\, their cavern commissioning status and their p erformance.\n\nhttps://indico.tlabs.ac.za/event/109/contributions/2216/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2216/ END:VEVENT BEGIN:VEVENT SUMMARY:Simulation of Monte-Carlo events at the LHC using a Generative mod el based on Kernel Density Estimation DTSTART;VALUE=DATE-TIME:20220323T133000Z DTEND;VALUE=DATE-TIME:20220323T134500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2210@indico.tlabs.ac.za DESCRIPTION:Speakers: Nidhi Tripathi (School of Physics\, Institute for Co llider Particle Physics\, University of the Witwatersrand)\nWe develop a m achine learning-based generative model\, using scikit-learn to generate a list of particle four-momenta from the Large Hadron Collider (LHC) proton- proton collisions. This method estimates the kernel density of the data us ing the Gaussian kernel and then generates additional samples from this di stribution. As an example of application\, we demonstrate the ability of t his approach to reproduce a set of kinematic features\, that are used for the search of new resonances decaying to Z(ll)γ final states at the LHC. This generative model is constructed to take the pre-processed Zγ events and generate sample data with accurate statistics\, mimicking the original distributions and achieving better performances with respect to the stand ard event Monte-Carlo generators.\n\nhttps://indico.tlabs.ac.za/event/109/ contributions/2210/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2210/ END:VEVENT BEGIN:VEVENT SUMMARY:A New Monte-Carlo Code System for Particles Transport DTSTART;VALUE=DATE-TIME:20220323T130000Z DTEND;VALUE=DATE-TIME:20220323T131500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2269@indico.tlabs.ac.za DESCRIPTION:Speakers: mourad fouka ()\nParticles Through Matter (or PTM for short) is a new Monte-Carlo C++ code system\, under development by us. The PTM is intended to be a general purpose Monte-Carlo code\, simulating all types of particles and their interactions with matter. The current ve rsion is still in an early stage of development\, although a minimum stuff of electromagnetic interactions is already done\, covering a wide energy range from low to high energies (at least collider energy scale). For elec tron/positron\, a minimal package of physical processes is done\, e.g.\, e nergy loss\, bremsstrahlung\, ionization\, coulomb scattering (single and multiple) and the annihilation for the positron. For photons\, the photoel ectric effect\, Rayleigh and Compton scattering and pair production are im plemented with different models. The PENELOPE option is implemented for bo th electron/positron and photons aside with the standard option. Optical p hoton and its processes is implemented too\, enabling performing simulatio ns of even complex optical systems\, e.g.\, refractive and reflective tele scopes. Fresnel lenses which present complex shapes of the surface are tak en into account. Further\, a minimal functioning package for neutrino prop agation and interaction (roughly implemented) through matter with matter e ffect is done\, with three active neutrino scheme and three active plus on e sterile neutrino. More details about the design of the code with some va lidation tests will be presented and discussed through this contribution.\ n\nhttps://indico.tlabs.ac.za/event/109/contributions/2269/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2269/ END:VEVENT BEGIN:VEVENT SUMMARY:The Use of a Variational Autoencoder in the Search for Resonances at the LHC DTSTART;VALUE=DATE-TIME:20220323T160000Z DTEND;VALUE=DATE-TIME:20220323T161500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2201@indico.tlabs.ac.za DESCRIPTION:Speakers: Finn Stevenson (University of the Witwatersrand\, CE RN)\nThe Standard Model (SM) of particle physics was completed by the disc overy of the Higgs boson in 2012 by the ATLAS and CMS collaborations. Howe ver\, the SM is not able to explain a number of phenomena and anomalies in the data. These discrepancies to the SM motivate the search for new boson s. In this paper\, searches for new bosons are completed by looking for Zg amma resonances in Zgamma (pp > H > Zgamma) fast simulation events. \nThis research makes use of a neural network\, more specifically a Variational Autoencoder (VAE)\, in the search for new bosons. The functionality of a V AE to be trained as both a generative model and a classification model mak es the architecture an attractive option for the search. The VAE is used a s a generative model to increase the amount of Zgamma fast simulation Mont e Carlo data whilst simultaneously being used to classify samples containi ng injected signal events that differ from the Monte Carlo data on which t he model was trained.\nBoth the generative capability and classification c apability of a single trained VAE model is evaluated. The evaluation of th e generative capability is done by assessing how similar the input distrib utions are to the generated distributions as well as how similar the corre lations between individual input variables are to the correlations between individual generated variables. \nThe classification capability is evalua ted by assessing how well the model is able to separate samples with vario us types and quantities of injected signal events versus samples containin g only background events.\n\nhttps://indico.tlabs.ac.za/event/109/contribu tions/2201/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2201/ END:VEVENT BEGIN:VEVENT SUMMARY:The search for resonances with topological requirements with the Z γ final state at the LHC DTSTART;VALUE=DATE-TIME:20220323T154500Z DTEND;VALUE=DATE-TIME:20220323T160000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2204@indico.tlabs.ac.za DESCRIPTION:Speakers: Nalamotse Joshua Choma (Wits University)\nMachine le arning techniques have been improving rapidly\, and this has seen their\na pplication grow within the high energy particle physics space. In this wor k\, we propose the use of deep neural networks based on full supervised le arning to search for heavy resonances at the electroweak scale with topolo gical requirements. This study is carried out in both inclusive and exclus ive regions of the phase space tailored for specific production mode. The technique is well situated for collider searches due to its ability to lea rn more complex functions\, and it is evaluated in the Zγ final state usi ng the Monte Carlo simulated signal samples for 139 $\\text{fb}^{-1}$ of i ntegrated luminosity for Run 2\, collected at the LHC. This approach is co mplemented with semi-supervised learning and used to calculate the limit o n the production of Higgs-like to Zγ where the significance of the signal is maximum.\n\nhttps://indico.tlabs.ac.za/event/109/contributions/2204/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2204/ END:VEVENT BEGIN:VEVENT SUMMARY:Higgs boson couplings at muon collider DTSTART;VALUE=DATE-TIME:20220323T153000Z DTEND;VALUE=DATE-TIME:20220323T154500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2266@indico.tlabs.ac.za DESCRIPTION:Speakers: Laura Buonincontri ()\nMuon collisions at multi-TeV center of mass energies are ideal for studying Higgs boson properties. Pre cise measurements of its couplings to fermions and bosons will be allowed by the high production rates that can be reached at these energies. Furthe rmore the double Higgs boson production rate could be sufficiently high to directly measure the parameters of trilinear self-couplings\, giving acce ss to the determination of the Higgs potential.\nIn this presentation an o verview of the results that have been obtained so far on Higgs couplings b y studying the $\\mu^+ \\mu^- \\to H \\nu \\bar{\\nu}$ and $\\mu^+ \\mu^- \\to H H\\nu \\bar{\\nu}$ processes at $\\sqrt{s}$ of 3 TeV will be given. All these studies have been performed by fully simulating the signal and physics background samples and by evaluating the effects of the beam-induc ed background on the detector performances.\nEvaluations on Higgs boson co uplings sensitivities and most recent results on the uncertainty on double Higgs production cross section and the trilinear Higgs self-coupling\, wi ll be presented and discussed.\n\nhttps://indico.tlabs.ac.za/event/109/con tributions/2266/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2266/ END:VEVENT BEGIN:VEVENT SUMMARY:Simulation of CMS resistive plate chamber (RPC) performance under different conditions DTSTART;VALUE=DATE-TIME:20220323T150000Z DTEND;VALUE=DATE-TIME:20220323T151500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2227@indico.tlabs.ac.za DESCRIPTION:Speakers: Tahany Abdelhameid (physics Department\, Faculty of Science\, Helwan University)\nThe resistive plate chamber (RPC) is a fast gaseous detector that provides a muon trigger system parallel with the dri ft tubes and cathode strip chambers in the CMS experiment. It consists of two parallel plates\, a positively-charged anode and a negatively-charged cathode\, both made of a very high resistivity plastic material and separa ted by a gas volume. It is used in many high-energy physics experiments du e to its simple design\, construction\, good time resolution\, high effici ency\, and low-cost production.\n\nIn this research\, we aimed to find the ideal operating conditions of the CMS RPCs using Garfield++ as simulation software. We studied the effect of temperature on various RPC parameters. The electron transport parameters like drift velocity\, Townsend coeffici ent and Diffusion coefficient have been computed under different temperatu res and gas mixtures using MAGBOLTZ\, while the primary ionization number and energy loss have been studied using HEED. We used the nearly exact Bou ndary Element Method (neBEM) solver in the calculation of the weighting fi eld and electric field. Finally\, we applied Ramo’s theorem to calculate the induced signal. \n\nThe simulation results showed that temperature af fects RPC performance. As the temperature increased\, the drift velocity\, Townsend coefficient and amplitude of the induced signal increased.\n\nht tps://indico.tlabs.ac.za/event/109/contributions/2227/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2227/ END:VEVENT BEGIN:VEVENT SUMMARY:Higgs CP measurement with EFT model in lepton collider DTSTART;VALUE=DATE-TIME:20220323T131500Z DTEND;VALUE=DATE-TIME:20220323T133000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2233@indico.tlabs.ac.za DESCRIPTION:Speakers: qiyu sha (中国科学院高能物理研究所)\nIn the Circular Electron Positron Collider (CEPC)\, a measurement of the Higg s charge and parity (\\textit{CP}) mixing through $e^{+} e^{-} \\rightarro w Z H \\rightarrow \\mu^{+} \\mu^{-} H(\\rightarrow b \\bar{b} / c \\bar{c } / g g)$ process is presented\, considering a scenario of analyzing $5.6\ \ a b^{-1}$ $e^{+} e^{-}$ collision data with the center-of-mass energy of $240\\ \\mathrm{GeV}$. \nIn this work\, a CP-mixing parameter p is greate r (less) than $5.40 \\times 10^{-2}$ ($ -5.52\\times 10^{-2}$) excluded at the $95\\%$ confidence level. \nThis study demonstrates the potential of precise measurement of the hadronic final states of the Higgs boson decay at the CEPC\, and will provide key information to look for the \\textit{CP }-odd Higgs.\n\nhttps://indico.tlabs.ac.za/event/109/contributions/2233/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2233/ END:VEVENT BEGIN:VEVENT SUMMARY:Single Event Effects qualification of candidate components for the ATLAS Tile Calorimeter Phase-II Upgrade Low Voltage power supply Bricks DTSTART;VALUE=DATE-TIME:20220323T160500Z DTEND;VALUE=DATE-TIME:20220323T162000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2226@indico.tlabs.ac.za DESCRIPTION:Speakers: Edward Nkadimeng (University of the Witwatersrand)\n Irradiation campaigns have been carried out in a variety of European facil ities to select radiation hard candidates for the upgraded version of the transformer coupled buck converter (Brick). The ATLAS detector is set to undergo a significant upgrade termed the "Phase-II" Upgrade. This talk pri marily focuses on the exposure of selected active components (power MOSFET s\, MOSFET drivers and isolation amplifiers) to a high energy proton beam at the Proton Irradiation Facility in PSI. A full scale production of nea rly 2048 finger Low Voltage power supplies Bricks\, with an identical outp ut voltage\, is set to be undertaken in the year 2022. The Low Voltage pow er supply (LVPS) Brick design\, which powers the TileCal front-end electro nics is currently being finalized. The tested single batch components were selected among candidates suitable to survive the full radiation toleranc e in preparation for the HL-LHC. A detailed compilation of the SEE results obtained\, along with the relevant set-up and observations will be discus sed.\n\nhttps://indico.tlabs.ac.za/event/109/contributions/2226/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2226/ END:VEVENT BEGIN:VEVENT SUMMARY:A Burn-in test station for the ATLAS Phase-IITile-calorimeter low- voltage power supply transformer-coupled buck converters DTSTART;VALUE=DATE-TIME:20220323T155000Z DTEND;VALUE=DATE-TIME:20220323T160500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2208@indico.tlabs.ac.za DESCRIPTION:Speakers: Ryan Mckenzie (University Of the Witwatersrand)\nThe upgrade of the ATLAS hadronic tile-calorimeter (TileCal) Low-Voltage Powe r Supply (LVPS) falls under the high-luminosity LHC upgrade project. This presentation serves to provide a detailed overview of the development of a Burn-in test station for use on an upgraded LVPS component known as a Bri ck. These Bricks are radiation hard transformer-coupled buck converters th at function to step-down bulk 200$\\\,$V DC power to the 10$\\\,$ V DC req uired by the on-detector electronics. To ensure the reliability of the Bri cks\, once installed within TileCal\, a Burn-in test station has been desi gned and built. The Burn-in station functions to implement a Burn-in proce dure on eight Bricks simultaneously. The Burn-in procedure subjects the Br icks to sub-optimal operating conditions which function to stimulate failu re mechanisms within the Bricks. This results in components that would fai l prematurely within TileCal failing within the Burn-in station thereby al lowing for their replacement which subsequently improves the reliability o f the Brick population. The Burn-in station is of a fully custom design in both its hardware and software. The development of the test station will be explored in detail with the presentation culminating in a discussion o f preliminary Burn-in results.\n\nhttps://indico.tlabs.ac.za/event/109/con tributions/2208/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2208/ END:VEVENT BEGIN:VEVENT SUMMARY:Searches for heavy scalar resonance through hadronic jet reconstru ction at electron-proton colliders DTSTART;VALUE=DATE-TIME:20220323T161500Z DTEND;VALUE=DATE-TIME:20220323T163000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2198@indico.tlabs.ac.za DESCRIPTION:Speakers: Elias Malwa (University of the Witwatersrand)\nA sea rch for the $CP$-even scalar $H$ in a SM + real singlet scalar field $\\p hi_{H}$ model is presented. A proposed high energy Future Circular Hadron- Electron Collider (FCC - LheC) would provide sufficient energy in a clean environment to probe the heavy scalar $H$ resonance\, $m_{H} \\approx$ 270 GeV in deep inelastic scattering (DIS) charged current (CC) and neutral c urrent (NC) process.\nHere we investigate the decay of the heavy Higgs lik e scalar $H \\to WW^{*}$ in DIS electron-proton collision with an integrat ed luminosity of 1.0 ab$^{-1}$ and centre of mass energy of $\\sqrt{s}= 1. 3(1.8)$ TeV at FCC-LHeC. \nWe estimate the likelihood of detecting a reson ance signal of $H$ from its final state jets by imposing cut based and mac hine learning optimization methods to select candidate jet pairs and recon struct the mass of $H$.\n\nhttps://indico.tlabs.ac.za/event/109/contributi ons/2198/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2198/ END:VEVENT BEGIN:VEVENT SUMMARY:Response of gap/crack scintillators of the Tile Calorimeter of the ATLAS detector to isolated muons from $W\\rightarrow \\mu\\nu$ events. DTSTART;VALUE=DATE-TIME:20220323T141500Z DTEND;VALUE=DATE-TIME:20220323T143000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2199@indico.tlabs.ac.za DESCRIPTION:Speakers: Phuti Rapheeha (Wits University)\nThe ATLAS Tile Cal orimeter is a hadronic sampling calorimeter that plays a major role in je t energy scale measurements. Accurate reconstruction of jets a vital role for precision measurements of the Standard Model and for searches of physi cs beyond the Standard Model.The jet energy scale is measured assuming uni formity of response in the azimuthal direction of both the Liquid Argon a nd Tile calorimeters. In this study\, the response of the gap/crack scinti llators of Tile calorimeter is measured using isolated muons from $W\\righ tarrow \\mu\\nu$ events. The response of the scintillating cells is quanti fied by measuring the amount of energy deposited per unit length in both d ata and Monte Carlo simulation to evaluate the response uniformity over th e azimuthal direction.\n\nhttps://indico.tlabs.ac.za/event/109/contributio ns/2199/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2199/ END:VEVENT BEGIN:VEVENT SUMMARY:The ATLAS Inner Detector trigger design and performance during Run 2 data taking from the 13 TeV LHC collisions DTSTART;VALUE=DATE-TIME:20220323T140000Z DTEND;VALUE=DATE-TIME:20220323T141500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2242@indico.tlabs.ac.za DESCRIPTION:Speakers: Soufiane Zerradi (Hassan II university\, faculty of science Ain Chock)\nThe ATLAS Inner Detector (ID) trigger is a crucial com ponent in the ATLAS trigger system\, and plays a pivotal role in the high quality reconstruction of the physics objects - electron\, muon\, tau and b-jet candidates. These objects are fundamental for physics studies and an alyses at ATLAS. The ATLAS ID trigger was redesigned during 2013-2015 shut down\, this provided the opportunity to improve its performance during Run 2 data taking from the 13 TeV Large Hadron Collider (LHC) collisions. The design and performance of the ATLAS ID trigger during Run 2 data taking f rom the 13 TeV LHC collisions are discussed\, as well as suggested plans a nd developments during 2019-2021 shutdown for the start of Run 3 and beyon d. The results presented here illustrate the superb performance of the ATL AS ID trigger\, even in the extreme number of proton-proton interactions p er bunch-crossing (pile-up) conditions of Run 2 data taking from the 13 Te V LHC.\n\nhttps://indico.tlabs.ac.za/event/109/contributions/2242/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2242/ END:VEVENT BEGIN:VEVENT SUMMARY:Extraction and analysis of the ATLAS Tile Calorimeter Low Voltage Power Supplies Temperature Data DTSTART;VALUE=DATE-TIME:20220323T153000Z DTEND;VALUE=DATE-TIME:20220323T154000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2217@indico.tlabs.ac.za DESCRIPTION:Speakers: Lungisani Phakathi (UNIZULU & iThemba Lab)\nPlugin b ased system for assessing the quality of data and conditions for ATLAS Til e Calorimeters is known as the Tile-in-One (TiO). The TiO is a collection of small sized independent web tools called plugins\, designed to make it easier for a user to evaluate Tile Calorimeter (TileCal) data. TiO platfor m aims to integrate individual TileCal web tools into a single common plat form\, which will share the same computing infrastructure and access to co mmon services and data\, as old interfaces are slowly falling behind and a re harder and harder to maintain. The TiO web platform should allow large flexibility and ease of maintenance so that it would be friendly to the pl ugin developers as well. The Data Control System (DCS) provides temperatur e data through a dedicated interface called DDV. Based on the possibility to query those data\, new TiO plugin is being developed under the followin g strategy: CentOs 8 was installed inside the virtual box to easily access CERN internal network. The DDV tool is used to query the TileDCS temperat ure data which are subsequently transformed to a form suitable for the vis ualizing library. The visualization tool allows user to interact with the plots. Currently the biggest focus is concentrated on finding an intuitive way to display not only the status of one particular module\, but the who le detector as well.\n\nhttps://indico.tlabs.ac.za/event/109/contributions /2217/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2217/ END:VEVENT BEGIN:VEVENT SUMMARY:The development of Strontium-90 Tile scanning table for TileCal at the ATLAS experiment DTSTART;VALUE=DATE-TIME:20220323T151500Z DTEND;VALUE=DATE-TIME:20220323T153000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2193@indico.tlabs.ac.za DESCRIPTION:Speakers: Gaogalalwe Mokgatitswane (University of the Witwater srand)\nDuring Phase I upgrade of the Tile Calorimeter of the ATLAS experi ment\, the characterization and qualification of assembled E3 and E4 scint illator counters (Crack) was conducted through manual scans using a stront ium-90 radioactive source and a small scanbox containing a photomultiplier tube. The Crack counter\, clear optical fiber cable and connections were exposed making transmitted scintillation light vulnerable to contamination by external light. This necessitated the development of an automated scan ning system and appropriate size of scanbox to allow housing of all compon ents. The one-coordinate positioning system of the scanner is driven by a powerful 103H5210-5240 Bipolar Stepper Motor. The motor is controlled by a n X-NUCLEO-IHM02A1 two-axis stepper motor driver expansion board based on the L6470 component\, which is plugged onto the Arduino Uno R3 microcontro ller to enable correct functionality. The boards are accessible via a ttyA CM0 serial port using a Universal Serial Bus cable connection and a softwa re to control the movement and data acquisition. The new scanning box will be employed after Run 3 of the Large Hadron Collider.\n\nhttps://indico.t labs.ac.za/event/109/contributions/2193/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2193/ END:VEVENT BEGIN:VEVENT SUMMARY:The Spin Physics Detector at NICA DTSTART;VALUE=DATE-TIME:20220323T151500Z DTEND;VALUE=DATE-TIME:20220323T153000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2244@indico.tlabs.ac.za DESCRIPTION:Speakers: Reham El-Kholy (Astronomy Department\, Faculty of Sc ience\, Cairo University\, Giza 12613\, Egypt)\nThe Spin Physics Detector (SPD) is planned to run at the NICA collider that is currently under const ruction at JINR (Dubna). The main goal of SPD is to study the spin structu re and other spin-related phenomena of the nucleon. SPD will operate with polarized proton-proton\, deuteron-deuteron\, and proton-deuteron collisio ns at energies up to $\\sqrt{s} = 27$ GeV and luminosity up to $10^{32}$ c m$^{-2}$ s$^{-1}$. The experiment setup is planned to be a universal multi purpose $4\\pi$ detector. Possible SPD studies with unpolarized proton and deuteron beams\, at the first stage of NICA operation\, are also being in vestigated.\n\nhttps://indico.tlabs.ac.za/event/109/contributions/2244/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2244/ END:VEVENT BEGIN:VEVENT SUMMARY:The Fast Simulation Chain in the ATLAS experiment DTSTART;VALUE=DATE-TIME:20220323T131500Z DTEND;VALUE=DATE-TIME:20220323T133000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2262@indico.tlabs.ac.za DESCRIPTION:Speakers: Brahim Aitbenchikh (Universite Hassan II\, Ain Chock (MA))\nThe ATLAS experiment at the large hadron collider relies on very l arge samples of simulated events that are required in the majority of phys ics analysis and performance studies in the ATLAS physics program. Produci ng such a huge number of simulated events using the Geant4 framework consu mes the CPU resources. The challenge is that in the high luminosity phase of LHC\, the average number of proton-proton collisions per bunch crossing will increase to about 200 collisions\, which will have a severe impact o n ATLAS computing resources. To meet the simulated sample statistics requi rements\, ATLAS is developing faster alternatives to the algorithms used i n the standard sample production chain. This document describes the new to ols for fast simulation chain that have been developed by ATLAS\, and show s their physics performance.\n\nhttps://indico.tlabs.ac.za/event/109/contr ibutions/2262/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2262/ END:VEVENT BEGIN:VEVENT SUMMARY:Minimum bias simulation of parasitic collisions DTSTART;VALUE=DATE-TIME:20220323T143000Z DTEND;VALUE=DATE-TIME:20220323T144500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2232@indico.tlabs.ac.za DESCRIPTION:Speakers: Sanae Ezzarqtouni (Universite Hassan II\, Ain Chock (MA))\, Driss Benchekroun ()\nParasitic collisions are proton-proton colli sions that happen offset from the nominal ATLAS interaction point. With a 25 ns bunch spacing\, the bunches can have parasitic encounters at z = n × 3.75 m\, with n < 7. Using MC simulations\, it would be possible to obs erve the distributions of key variables (from tracks and energy deposits) for such events at various distances. The task consisted of the generation of minimum bias MC samples\, applying a Z offset to reproduce the effect and simulate the ATLAS detector response in release 21\, and reconstructin g the observables\, based on muon segments\, jets topology\, Pixels cluste rs.\n\nhttps://indico.tlabs.ac.za/event/109/contributions/2232/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2232/ END:VEVENT BEGIN:VEVENT SUMMARY:Charged Higgs boson production via pp → H ± bj at the LHC DTSTART;VALUE=DATE-TIME:20220323T140000Z DTEND;VALUE=DATE-TIME:20220323T141500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2260@indico.tlabs.ac.za DESCRIPTION:Speakers: Mohamed Ouchemhou (Cadi Ayyad University\, Marrakech \, Morocco.)\nThe charged Higgs searches can be served to probe new physic s at the LHC. In this study\, we focus on the associated production of the charged Higgs boson with the bottom-quark and jet in 2HDM-type-I as a pro mising mode for a light H ± \, i.e. m H ± < mt . We consider both situat ions where h(H) are the SM-like Higgs boson discovered with a mass near 12 5 GeV and investigate their bosonic decays\, such as H± → W± h and/or H± → W± A. We explore the possible signals at the LHC taking into acco unt the theoretical and experimental constraints\, as a result\, we find t hat\, over a substantial region of the 2HDM-I parameter space\, the Signal qbW + 2b/2τ /2γ could severe as a promising and alternative signal that might serve to discover\nthe H± states at the LHC.\n\nhttps://indico.tla bs.ac.za/event/109/contributions/2260/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2260/ END:VEVENT BEGIN:VEVENT SUMMARY:CP-even Heavy Higgs boson at HL-LHC DTSTART;VALUE=DATE-TIME:20220323T134500Z DTEND;VALUE=DATE-TIME:20220323T140000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2264@indico.tlabs.ac.za DESCRIPTION:Speakers: Aya I. Beshr (Physics Department\, Faculty of Women for Arts\, Science and Education\, Ain Shams University\, Heliopolis\, Cai ro 11757\, Egypt)\nWe investigate the possibility of observing a havey Hig gs boson ($H$) within the context of type-I 2 Higgs Doublet Model (2HDM). Our study is focused on $gg$ $\\rightarrow{}$ $H \\rightarrow{} hh \\right arrow{} b$$\\bar{b}$ $ZZ \\rightarrow{} b\\bar{b}4\\mu$ for $H$ production and decay. The study is done assuming a data-set of size 3000 $fb^{-1}$ o f proton-proton collisions at $\\surd s = 14$ TeV at High Luminosity Large Hadron Collider (HL-LHC). According to scans over the parameter space\, w e consider two promising benchmark points for this analysis. Signal and ba ckground samples are produced using MonteCarlo (MC) simulation where the d etector response is based on CMS detector PhaseII Upgrade. We find that th e mass distributions of our signal are consistent with those obtained by p revious experimental study performed on HHbb4l channel where they investig ated the self Higgs coupling using the full Run2 data of the CMS detector with $\\surd s = 13$ TeV and $L_{int}= 137 fb^{-1}$.\n\nhttps://indico.tla bs.ac.za/event/109/contributions/2264/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2264/ END:VEVENT BEGIN:VEVENT SUMMARY:Dark photon searches with the ATLAS detector at the LHC DTSTART;VALUE=DATE-TIME:20220323T133000Z DTEND;VALUE=DATE-TIME:20220323T134500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2224@indico.tlabs.ac.za DESCRIPTION:Speakers: Hassnae El Jarrari (Universite Mohammed V (MA))\nMan y extensions to the Standard Model (SM) introduce a hidden or dark sector (DS) to provide candidates for dark matter in the universe and an explanat ion to astrophysical observations such as the positron excess observed in the cosmic radiation flux. This hidden sector could rise from an additiona l U(1)d gauge symmetry. ATLAS has searched for the gauge boson of the DS\, which could be a massless or massive dark photon that either kinetically mixes with the SM photon or\ncouples to the Higgs sector via some mediator s. If dark photons decay in turn to SM particles with a significant branch ing ratio\, we could either observe measurable deviations in some particul ar Higgs boson decay channels or new exotic signatures that would be acces sible at the Large Hadron Collider (LHC) energies. An overview of searches of dark photon signals with the ATLAS detector\, with a particular emphas is on some SM Higgs decay channels will be presented.\n\nhttps://indico.tl abs.ac.za/event/109/contributions/2224/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2224/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for Higgs boson pair production in the two bottom quarks pl us two photons final state in $pp$ collisions at $\\sqrt{s}$ = 13 TeV with the ATLAS detector DTSTART;VALUE=DATE-TIME:20220323T130000Z DTEND;VALUE=DATE-TIME:20220323T131500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2214@indico.tlabs.ac.za DESCRIPTION:Speakers: Mohamed Belfkir (UAEU)\nFrom the discovery of the Hi ggs boson in 2012\, most of its properties such as mass\, spin\, productio n cross-section and its coupling to fermions and bosons have been measured . However\, the trilinear self-coupling $\\lambda_{HHH}$ of the Higgs boso n has not been measured yet. This parameter controls the shape of the Higg s potential\, explaining the importance of its measurement. Deviation from its Standard Model (SM) predicted value would indicate new physics beyond the SM (BSM). Deviations are quantified through the $\\kappa_{\\lambda}$ modifier. At the LHC\, it is measured through the rate of the rare Higgs b oson pair production (HH) process\, which is the only direct way to access it. This process is mainly produced at the LHC via gluon-gluon fusion (gg F) through destructive interference of two Feynman diagrams involving quar k loops and the triple Higgs boson self-interaction. At the LHC centre-of- mass energy of 13 TeV\, the cross-section of the Higgs boson pair producti on is $31.05_{-5.0\\%}^{+2.2\\%}$ fb as predicted by the SM. This low cros s-section could be enhanced by the presence of BSM physics (non-resonant a nd resonant)\, thus the motivation to explore the search for the double Hi ggs production. \nThis presentation will focus on the search for the Higgs boson pair production in the two bottom quarks plus two photons final sta tes with the 2015-2018 data recorded by the ATLAS detector recently publis hed (https://arxiv.org/pdf/2112.11876.pdf). This search sets observed (exp ected) upper limits to the HH cross-section of 4.2 (5.7) times the SM expe ctation. The observed (expected) constrains on the Higgs boson trilinear m odifier $\\kappa_{\\lambda}$ are determined to be [-1.5\, 6.7] ([-2.4\, 7. 7]) at 95% confidence level. The search explores the resonant production o f double Higgs ($pp\\to X \\to HH$) and sets limits on its cross-section a s a function of the $m_{X}$. The observed (expected) limits on the cross- section of $pp\\to X \\to HH$ range from 610 fb to 47 fb (360 fb to 43 fb) over the constrained mass range.\nIn this presentation\, both the search for the resonant and non-resonant double Higgs production will be detailed \, in addition to a comparison with other searches f the Higgs pair produc tion with other final states and using data collected between 2015-2016.\n \nhttps://indico.tlabs.ac.za/event/109/contributions/2214/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2214/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for Higgs boson pair production in the bbWW* channel with t he ATLAS detector DTSTART;VALUE=DATE-TIME:20220323T164500Z DTEND;VALUE=DATE-TIME:20220323T170000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2200@indico.tlabs.ac.za DESCRIPTION:Speakers: Mourad Hidaoui (Ibn-Tofail University Faculty of Sci ences (MA))\nSearch for resonant Higgs boson pair production\, where one H iggs boson decays to bb and the other to WW\, using the full Run 2 data of proton-proton collisions collected at a center-of-mass energy of 13 TeV w ith the ATLAS detector. The trilinear coupling leads to non-resonant pair production of Higgs bosons\, where an off-shell Higgs decays to a pair of Higgs bosons. Physics beyond the SM can manifest in the resonant productio n of new particles that decay into a pair of SM Higgs bosons. This study i s potentially sensitive to cases where the decaying particle is a scalar\, as in the MSSM and 2HDM models\, or a spin-2 graviton\, as in Randall–S undrum models.\n\nhttps://indico.tlabs.ac.za/event/109/contributions/2200/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2200/ END:VEVENT BEGIN:VEVENT SUMMARY:Explaining a class of multi-lepton excesses at the LHC with a heav y pseudo-scalar of a 2HDM+$S$ model DTSTART;VALUE=DATE-TIME:20220322T154500Z DTEND;VALUE=DATE-TIME:20220322T160000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2203@indico.tlabs.ac.za DESCRIPTION:Speakers: Abhaya Kumar Swain (School of Physics and Institute for Collider Particle Physics\, University of the Witwatersrand\, Johannes burg\, Wits 2050\, South Africa.)\nThe Standard Model (SM) of particle phy sics is complete after the discovery of a Higgs-like boson at the Large Ha dron Collider (LHC) by ATLAS and CMS collaboration. Although the measured properties of it is compatible with the one predicted by the SM\, this doe s not exclude the possible existence of additional scalar bosons as long a s the mixing with the SM higgs is small. In fact\, in recent years the so called "multi-lepton anomalies" emerged as deviations from the SM precdict ions in several analyses of multi-lepton final states from ATLAS and CMS. These excesses are reasonably well described by a 2HDM+$S$ model\, where t he mass of the heavy scalar $m_H\\approx 270$\\\,GeV\, the mass of the sin glet scalar $m_S\\approx 150$\\\,GeV. In this talk I will concentrate in d escribing a new class of multi-lepton excesses that can be explained with the CP-odd particle of the same 2HDM+$S$ model. We have considered the dom inant decays of the heavy scalar\, $H\\rightarrow Sh\,SS$ and looked at va rious multi-lepton final states to explain the excess. With this motivatio n\, a candidate for a scalar resonance has been reported with a mass of 15 1.5\\\,GeV by looking at the existing SM higgs searches in the $\\gamma \\ gamma$ and $Z \\gamma$ channels with associated leptons\, di-jets\, bjets and missing energy. There are a number of small excesses in searches at th e LHC for heavy (pseudo)-scalars in the mass range 400-600\\\,GeV\, here w e have assumed that to be the heavy pseudo-scalar of the 2HDM+$S$ model. T he region of the parameter space that explains the multi-lepton excesses\, the leading decays of the heavy pseudo-scalar are $A\\rightarrow ZH\,t\\o verline{t}$ producing four top and four lepton final states. Here we will discuss the multi-lepton final state in conjunction with the multi-lepton excesses observed at the LHC.\n\nhttps://indico.tlabs.ac.za/event/109/cont ributions/2203/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2203/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrino masses in the left right symmetric model DTSTART;VALUE=DATE-TIME:20220322T134500Z DTEND;VALUE=DATE-TIME:20220322T140000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2229@indico.tlabs.ac.za DESCRIPTION:Speakers: Mustapha OUCHEN (Mohammed V UNIVERSITY\, Faculty of Science RABAT)\nAddressing the question of the small neutrino masses in th e LRSM. The results is very appealing as the LRSM leads to the celebrated seesaw mechanism\, which ensures the small neutrino masses.\\\\\nIn additi on the LRSM may have new particles at TeV scale giving a dominant contribu tion to $0\\nu 2\\beta \\beta$ decay\, that can be reached by the future t on-scale experiments.\n\nhttps://indico.tlabs.ac.za/event/109/contribution s/2229/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2229/ END:VEVENT BEGIN:VEVENT SUMMARY:Leptogenesis\, fermion masses and mixings in a flavored SUSY SU(5) GUT DTSTART;VALUE=DATE-TIME:20220322T140000Z DTEND;VALUE=DATE-TIME:20220322T141500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2221@indico.tlabs.ac.za DESCRIPTION:Speakers: Mohamed Amin Loualidi (LPHE-MS\, Faculty of Science\ , Mohammed V University in Rabat)\nWe propose a a highly predictive 4D SU( 5) GUT with a $D_{4}$ flavor symmetry to study fermion masses and mixings. The Yukawa matrices of quarks and charged leptons are obtained after inte grating out heavy messenger fields from renormalizable superpotentials whi le neutrino masses are originated from the type I seesaw mechanism. The gr oup theoretical factors from 24- and 45-dimensional Higgs fields lead to r atios between the Yukawa couplings in agreement with data\, while the dang erous proton decay operators are highly suppressed. By performing a numeri cal fit\, we find that the model captures accurately the mixing angles\, t he Yukawa couplings and the CP phase of the quark sector at the GUT scale. The neutrino masses are generated at the leading order with the predictio n of trimaximal mixing while an additional effective operator is required to account for the baryon asymmetry of the universe (BAU). An analytical a nd a numerical study of the BAU via the leptogenesis mechanism is performe d where strong correlations between the parameters of the neutrino sector and the observed BAU are obtained.\n\nhttps://indico.tlabs.ac.za/event/109 /contributions/2221/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2221/ END:VEVENT BEGIN:VEVENT SUMMARY:Full next-to-leading-order corrections to the Higgs strahlung proc ess from electron–positron collisions in the Inert Higgs Doublet Model DTSTART;VALUE=DATE-TIME:20220322T133000Z DTEND;VALUE=DATE-TIME:20220322T134500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2211@indico.tlabs.ac.za DESCRIPTION:Speakers: hamza abouabid (Université AbdelMalek Essaadi\, Tan gier\, Morocco)\nWe present the cross section of the Higgs strahlung\, $e^ + e^- \\to h Z^0 $\, at the full next-leading order in the Inert Higgs Dou blet Model (IHDM) at the future Higgs factories We systematically calculat ed both weak and QED corrections by using FeynArts/FormCalc to compute bot h the weak and the one-loop virtual corrections and Feynman Diagram Calcu lation (FDC) to evaluate the real photon emission. We evaluated the contri bution of the new physics on the radiation corrections in this process for three typical collision energies of future electron-positron colliders :2 50 GeV\, 500 GeV and 1 TeV\, taking into account the theoretical and the e xperimental constraints. We have found a sizeable deviations of the IHDM r adiation corrections from the Standard model NLO values\, those deviations are within the detection potentials of the future Higgs factories. In the light of these results\, we suggest three interesting benchmark points of IHDM for the futures Higgs facilities.\n\nhttps://indico.tlabs.ac.za/even t/109/contributions/2211/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2211/ END:VEVENT BEGIN:VEVENT SUMMARY:New charged Higgs boson discovery channel at the LHC DTSTART;VALUE=DATE-TIME:20220322T131500Z DTEND;VALUE=DATE-TIME:20220322T133000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2205@indico.tlabs.ac.za DESCRIPTION:Speakers: Mohammed Boukidi (Cadi Ayyad University\, Marrakech) \nThe ATLAS and CMS experiments have an ambitious search program for charg ed Higgs bosons. The two main searches for $H^\\pm$ at the LHC have tradit ionally been performed in the $\\tau \\nu$ and $t b$ decay channels\, as t hey provide the opportunity to probe complementary regions of the Minimal SuperSymmetric Model (MSSM) parameter space. Charged Higgs bosons may dec ay also to light quarks\, $H^\\pm \\to cs/cb$\, which represent an additio nal probe for the mass range below $m_t$. In this work\, we focus on $H^\\ pm \\to \\mu \\nu$ as an alternative channel in the context of two Higgs d oublet model type III. We explored the prospect of looking $pp\\to tb H^\ \pm$\, followed by $H^\\pm\\to\\mu \\nu$ signal at the LHC. Such a scenari o appears in 2HDM type-III where couplings of the charged Higgs are enhan ced to $\\mu\\nu$. Almost all the experimental searches rely on the produ ction and decay of the charged Higgs are taken into account. We show that for a such scenario\, the above signal is dominant for most of the parame ter space\, and $H^\\pm \\to \\mu\\nu$ can be an excellent complementary s earch. Benchmarks points are proposed for further Monte Carlo analysis.\n\ nhttps://indico.tlabs.ac.za/event/109/contributions/2205/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2205/ END:VEVENT BEGIN:VEVENT SUMMARY:The Production of a Singlet Scalar at Future e+ e- Colliders DTSTART;VALUE=DATE-TIME:20220322T153000Z DTEND;VALUE=DATE-TIME:20220322T154500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2194@indico.tlabs.ac.za DESCRIPTION:Speakers: Anza-Tshilidzi Mulaudzi ()\nMotivated by the multi-l epton anomalies\, a search for narrow resonances with $S\\rightarrow\\gamm a\\gamma\, Z\\gamma$ in association with light jets\, $b$-jets or missing transverse energy was reported in the paper arXiv:2109.02650. The maximum local (global) significance is achieved for $m_S=151.5$\\\,GeV with 5.1$\\ sigma$ (4.8$\\sigma$). In this paper we compute the production cross-secti on of this scalar candidate in $e^+e^-$ collision by assuming that the cou plings to Electro-Weak bosons are loop induced. We find that the cross-sec tion could be large enough for $S$ to be detected at future $e^+e^-$ colli ders. The leading production mechanism is $e^+e^-\\rightarrow Z^{\\star}\\ rightarrow S\\gamma$\, which offers the opportunity of isolating $S$ throu gh the missing mass method.\n\nhttps://indico.tlabs.ac.za/event/109/contri butions/2194/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2194/ END:VEVENT BEGIN:VEVENT SUMMARY:the Mu2e experiment DTSTART;VALUE=DATE-TIME:20220322T151500Z DTEND;VALUE=DATE-TIME:20220322T153000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2195@indico.tlabs.ac.za DESCRIPTION:Speakers: fabio happacher (infn)\nThe Mu2e experiment at Fermi National Accelerator Laboratory (Batavia\, Illinois\, USA) searches for t he charged-lepton flavor violating neutrino-less conversion of a negative muon into an electron in the field of an aluminum nucleus. The dynamics of such a process is well modelled by a two-body decay\, resulting in a mono -energetic electron with energy slightly below the muon rest mass (104.967 MeV). Mu2e will reach a single event sensitivity of about 3x10−17 tha t corresponds to four orders of magnitude improvement with respect to the current best limit. We will describe the physics motivations\, the underly ing experimental technique and the experiment construction status.\n\nhttp s://indico.tlabs.ac.za/event/109/contributions/2195/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2195/ END:VEVENT BEGIN:VEVENT SUMMARY:On 6D N=(1\,0) Supergravity DTSTART;VALUE=DATE-TIME:20220321T144000Z DTEND;VALUE=DATE-TIME:20220321T145500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2231@indico.tlabs.ac.za DESCRIPTION:Speakers: Rajae Sammani (LPHE-MS\, Science faculty\, Mohammed V University in Rabat\, Morocco.)\nThe main quest of modern physics is to describe all four elementary interactions within the same framework. Our i nability to incorporate gravity as a renormalizable quantum field theory i s a major motivation for a physics beyond the standard model\, the most am azing progress we have made to understand quantum gravity is through local supersymmetry theory: supergravity. We contribute to outlining the most necessary consistency conditions fo r any quantum gravity theory essentially the anomaly consideration\, the m oduli space consideration\, the BPS space consideration and some geometric conditions. All within the framework of 6D supergravity theories due to t heir successful landscape analysis.\n\nhttps://indico.tlabs.ac.za/event/10 9/contributions/2231/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2231/ END:VEVENT BEGIN:VEVENT SUMMARY:$T_{QQ}$ -like states from QCD Laplace sum rules and Double ratio of sum rules DTSTART;VALUE=DATE-TIME:20220321T164000Z DTEND;VALUE=DATE-TIME:20220321T165500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2255@indico.tlabs.ac.za DESCRIPTION:Speakers: Davidson Rabetiarivony (Institute of High Energy Phy sics of Madagascar\, University of Antananarivo)\nMotivated by the recent LHCb-group discovery of an exotic hadron at 3878 MeV interpreted as $J^P = 1^+$\n$T_{cc}$ tetraquark state \, we improve in this work the existing r esults from QCD Spectral Sum Rules (QSSR)\nat lowest order (LO) by combini ng the mass determinations from the ratio R of Inverse Laplace sum rules\n (LSR) with the double ratio of sum rules (DRSR). In so doing\, we start by improving the previous mass and\ncoupling of the X(3872) which will be us ed as input in the DRSR method. We extend our analyzes to the\nSU3 breakin g $T_{cc\\bar{s}\\bar{u}}$ state and to the bottom sector.\n\nhttps://indi co.tlabs.ac.za/event/109/contributions/2255/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2255/ END:VEVENT BEGIN:VEVENT SUMMARY:Scattering amplitude and its soft decomposition DTSTART;VALUE=DATE-TIME:20220321T162500Z DTEND;VALUE=DATE-TIME:20220321T164000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2225@indico.tlabs.ac.za DESCRIPTION:Speakers: Andriniaina Narindra Rasoanaivo (Ecole Normale Supé rieure Université d'Antananarivo)\nIn the pure scattering theory\, the un iversality of the soft limit has been studied for a long time. In this tal k we review the property of soft limit to relate an *n*-point amplitude to an (*n*-1)-point amplitude. We show how this property can be used to deco mpose amplitudes into different complementary soft channel. The existence of such decomposition provides a new way to understand how to construct am plitude solely from them soft limit.\n\nhttps://indico.tlabs.ac.za/event/1 09/contributions/2225/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2225/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrinos and the Invisible Universe DTSTART;VALUE=DATE-TIME:20220321T100000Z DTEND;VALUE=DATE-TIME:20220321T103000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2277@indico.tlabs.ac.za DESCRIPTION:Speakers: Belen Gavela (Universidad Autonoma de Madrid and IFT -UAM/CSIC)\nhttps://indico.tlabs.ac.za/event/109/contributions/2277/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2277/ END:VEVENT BEGIN:VEVENT SUMMARY:Modular Flavour Symmetries in magnetized toroidal orbifolds DTSTART;VALUE=DATE-TIME:20220321T161000Z DTEND;VALUE=DATE-TIME:20220321T162500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2206@indico.tlabs.ac.za DESCRIPTION:Speakers: Mohamad Amegroud (LPHE-Modeling and Simulation\, Fac ulty of Sciences\, University Mohammed V in Rabat\, Morocco.)\nThe major p roblems in particle physics is the origin of the flavour structure of the quarks\, leptons and the generation number\, mass hierarchy and mixing ang les. One of the candidates for the origin of flavour structure may be in h igher dimensional theories such as superstrings\; certain compactification s of superstrings\, lead to non-abelian discrete flavour symmetries. In th is contribution\, we consider the 6-D supersymmetric gauge theory compacti fied on torus orbifold $T^2/Z_2$ with non-trivial magnetic flux to investi gate flavour modular symmetry. The example of flavour symmetry $S_4$ is gi ven. Other aspects are also described.\n\nhttps://indico.tlabs.ac.za/event /109/contributions/2206/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2206/ END:VEVENT BEGIN:VEVENT SUMMARY:The discovery of the Higgs boson at the LHC DTSTART;VALUE=DATE-TIME:20220321T083000Z DTEND;VALUE=DATE-TIME:20220321T090000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2275@indico.tlabs.ac.za DESCRIPTION:Speakers: Tejinder Virdee (Imperial College London)\nhttps:// indico.tlabs.ac.za/event/109/contributions/2275/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2275/ END:VEVENT BEGIN:VEVENT SUMMARY:Tensor Network Theory DTSTART;VALUE=DATE-TIME:20220321T154000Z DTEND;VALUE=DATE-TIME:20220321T155500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2252@indico.tlabs.ac.za DESCRIPTION:Speakers: Youssef EL MAADI (Mohammed V University in Rabat)\nW e introduce some basic definitions and concepts of tensor network. We show that the tensor network can be used to represent quantum many-body states \, where we explain MPS(Matrix Product States) in 1D and PEPS (Projected E ntangled Pair States) in 2D systems\, as well as the generalizations to th ermal states and operators. The quantum entanglement properties of the ten sor network states including the area law of entanglement entropy also be discussed. Finally\, we present several special tensor network's that can be exactly contracted\, and demonstrate the difficulty of contracting tens or network's in general cases.\n\nhttps://indico.tlabs.ac.za/event/109/con tributions/2252/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2252/ END:VEVENT BEGIN:VEVENT SUMMARY:NLO Scattering in ϕ^4 Theory Finite System Size Correction DTSTART;VALUE=DATE-TIME:20220321T171000Z DTEND;VALUE=DATE-TIME:20220321T172500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2267@indico.tlabs.ac.za DESCRIPTION:Speakers: Jean Du Plessis (Stellenbosch University)\nPreviousl y an equation of state for the relativistic hydrodynamics encountered in h eavy-ion collisions at the LHC has been calculated using lattice QCD metho ds. This leads to a prediction of very low viscosity\, due to the trace an omaly. Finite system corrections to this trace anomaly could challenge thi s calculation\, since the lattice QCD calculation was preformed in an effe ctively infinite system. To verify this trace anomaly it is beneficial to add the finite system corrections that will be encountered. We construct a massive $\\phi^4$ theory while imposing periodic boundary conditions on n of the 3 spatial dimensions. $2\\rightarrow2$ NLO scattering is then comp uted\, while analytically making sure the optical theorem holds\, to ensur e unitarity remains intact despite the pathological nature of the finite s ystem. In order to develop a solid mathematical basis that will carry forw ard into the thermal field theory context\, some small and large argument analysis (in terms of the incoming energy as well as the length scales of the finite dimensions) is performed on the s\,t and u channels separately. Finally the finite size corrections to the total cross section\, running coupling and effective coupling is explored numerically\, in order to esti mate the size of such finite system corrections in massive field theories. \n\nThe size of these effects appears to depend very sensitively on the le ngth scales of the finite dimensions\, the number of finite dimensions\, t he energy of the scattering as well as the size of the renormalized coupli ng. For parameters comparable to what is found for QCD at the LHC it is un clear if the corrections would be detectable or not. Due to the pathologic al nature of the system it is also found that there are energies at which the total cross section becomes infinite when there are 2 finite dimension s\, and that the cross section is infinite for all physical energies when all three spatial dimensions are finite. This makes interpretation difficu lt\, and suggests the need to consider scattering happening in a finite ti me-span. It does however suggest that a fuller treatment of finite-system time-independent QCD may reveal detectable finite system effects\, possibl y challenging or confirming the low viscosity of the relativistic Quark Gl uon Plasma generated in heavy-ion collisions\, as calculated as a conseque nce of the numerically calculated lattice QCD equation of state.\n\nhttps: //indico.tlabs.ac.za/event/109/contributions/2267/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2267/ END:VEVENT BEGIN:VEVENT SUMMARY:Big Science for National and Regional Unity DTSTART;VALUE=DATE-TIME:20220321T133000Z DTEND;VALUE=DATE-TIME:20220321T135500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2258@indico.tlabs.ac.za DESCRIPTION:Speakers: Nadir Hashim (Kenyatta University)\nBig science is c haracterized by long term multi-lateral engagements and large scale instru ments that are used to address fundamental questions in science. The proje cts in big science work require huge funding and extensive collaborations at the regional and international levels. Experiences elsewhere\, for exam ple in Europe and the Middle East\, have shown that in addition to technol ogical developments\, big science work brings communities of people togeth er to address common scientific goals. Africa will be hosting the Square K ilometer Array (SKA) project. This is the world’s largest array of radio telescopes to be operated in Africa and Australia. South Africa is one of the founder members of the global SKA organization. There are eight partn er countries of the SKA in Africa. The SKA and the AVN (African VLBI Netwo rk) present Africa with a great opportunity for scientists in the region t o work together with world scientists. This is a unique opportunity to use big science as a means to attain regional cohesion and unity. This paper focusses on the following: how big science has contributed to unity in the European Middle-Eastern regions\; the experiences from particle physics r esearch at the European Organization for Nuclear Research – CERN\; the p otential for big science to enhance national and regional unity in Africa\ ; and the way forward for Africa.\n\nhttps://indico.tlabs.ac.za/event/109/ contributions/2258/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2258/ END:VEVENT BEGIN:VEVENT SUMMARY:Flavor changing neutral current in the flipped 341 model DTSTART;VALUE=DATE-TIME:20220321T155500Z DTEND;VALUE=DATE-TIME:20220321T161000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2215@indico.tlabs.ac.za DESCRIPTION:Speakers: Meriem Djouala (Laboratoire de physique Mathématiqu es et Subatomique\, Frères Mentouri university Constantine 1-Algeria)\nWe present a new chiral gauge anomaly flipped 341 model where lepton familie s are arranged in different SU(4) gauge group representations leading to a nonuniversal coupling with heavy neutral gauge bosons $Z^{\\prime}$ and $ Z^{\\prime\\prime}$ of the model. The resulted flavor-changing neutral cur rent in the leptonic sector is discussed and bounds on some of the flavor changing parameters are derived using the recent experimental data on the muon rare decays.\n\nhttps://indico.tlabs.ac.za/event/109/contributions/22 15/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2215/ END:VEVENT BEGIN:VEVENT SUMMARY:Asymptotic Grand Unification DTSTART;VALUE=DATE-TIME:20220321T145500Z DTEND;VALUE=DATE-TIME:20220321T151000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2213@indico.tlabs.ac.za DESCRIPTION:Speakers: Mohammed Omer Khojali (Department of Physics\, Univ ersity of Johannesburg\, PO Box 524\, Auckland Park 2006\, South Africa)\n We explicitly test the asymptotic grand unification of a minimal 5-dimensi onal model with SO(10) gauge theory compactified on an $S^{1}/Z_{2}\\times Z^{\\prime}_{2}$ orbifold. We consider that all the matter fields propaga te in the bulk and show that the gauge couplings asymptotically run to a u nified fixed point in the UV. However\, the Yukawa couplings will typicall y hit a Landau pole before the GUT scale in this class of $SO(10)$ models. \n\nhttps://indico.tlabs.ac.za/event/109/contributions/2213/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2213/ END:VEVENT BEGIN:VEVENT SUMMARY:Influence of the laser field on electron muon neutrino processus DTSTART;VALUE=DATE-TIME:20220321T142500Z DTEND;VALUE=DATE-TIME:20220321T144000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2207@indico.tlabs.ac.za DESCRIPTION:Speakers: sabrine el asri (sultan molay slimane beni mellal)\ nIn view of the great contribution of neutrino-electron scattering to the deep understanding of\nelectroweak interactions\, we focus in this paper o n the study of elastic scattering of a muon neutrino\nby an electron (e − ν μ → e − ν μ ) in the presence of a circularly polarized elec tromagnetic field. We perform our theoretical calculation within the frame work of Fermi theory using the exact wave functions of charged particles i n an electromagnetic field. The expression of the differential cross\nsect ion (DCS) for this process is obtained analytically in the absence and pre sence of the laser field. The effect of the field strength and frequency o n the exchange of photons as well as on the DCS is presented and analyzed. \nkeywords: Laser-assisted \, Cross Section\, Electrweak Interaction\n\nht tps://indico.tlabs.ac.za/event/109/contributions/2207/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2207/ END:VEVENT BEGIN:VEVENT SUMMARY:Overview on laser-assisted decay processes DTSTART;VALUE=DATE-TIME:20220321T135500Z DTEND;VALUE=DATE-TIME:20220321T141000Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2190@indico.tlabs.ac.za DESCRIPTION:Speakers: Mohamed JAKHA (Sultan Moulay Slimane University\, Po lydisciplinary Faculty\, Beni Mellal\, Morocco)\nThis work focuses on the controversial debate that has arisen over the last two decades about the p ossibility that the electromagnetic field affects the lifetime or decay wi dth of an unstable particle. In this presentation\, we highlight the possi ble effect of the electromagnetic field on the decay of particles through the theoretical study of some decay processes such as those of the pi (pio n) meson and the intermediate vector bosons $W$ and $Z$ in the presence of an electromagnetic field. Expressions for the decay width and lifetime in the presence of the field have been derived in the framework of the stand ard electroweak model. The numerical results obtained are presented and di scussed.\n\nhttps://indico.tlabs.ac.za/event/109/contributions/2190/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2190/ END:VEVENT BEGIN:VEVENT SUMMARY:Laser-assisted processes beyond the standard model DTSTART;VALUE=DATE-TIME:20220321T141000Z DTEND;VALUE=DATE-TIME:20220321T142500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2189@indico.tlabs.ac.za DESCRIPTION:Speakers: Mohamed OUHAMMOU (sultan moulay slimane university)\ nIn this work\, we have theoretically studied the neutral Higgs pair produ ction in Two Higgs Doublet Model (THDM) in the presence of a circularly po larized laser field. The laser-assisted differential partial cross section is derived in the centre of mass frame at the leading order including Z d iagram. The total cross section is computed numerically by integrating the differential cross section over the solid angle dΩ. Two benchmark points are discussed for the THDM parameters. In the first step\, we have analyz ed the total cross section of e+e− → h0A0 by considering H 0 as the st andard model-like Higgs boson. Then\, the process e+e− → H0A0 is studi ed by taking h0 as the Higgs boson of the standard model. For both benchma rk points\, the laser-assisted total cross section of the studied processe s depends on the produced neutral Higgs masses\, the centre of mass energy and the laser field parameters. In addition\, the maximum cross section o ccurs at high centre of mass energy for the process e+e− → H0A0 as com pared to that of e+e− → h0A0 .\n\nhttps://indico.tlabs.ac.za/event/109 /contributions/2189/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2189/ END:VEVENT BEGIN:VEVENT SUMMARY:Thermodynamic of black holes in a cavity from shadow formalism DTSTART;VALUE=DATE-TIME:20220321T163000Z DTEND;VALUE=DATE-TIME:20220321T164500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2197@indico.tlabs.ac.za DESCRIPTION:Speakers: Mohamed BENALI (Département de Physique\, Equipe de s Sciences de la matière et du rayonnement\, ESMaR)\nUsing the Hamilton-J acobi formalism\, we investigate the shadow behaviors of the black holes i n a cavity. We approach such behaviors from the thermodynamic quantities. Among others\, we establish a possible interplay between the ther modynamic and shadow aspects of such balck hole solutions.\n\nhttps://indi co.tlabs.ac.za/event/109/contributions/2197/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2197/ END:VEVENT BEGIN:VEVENT SUMMARY:T2K Status and Plans DTSTART;VALUE=DATE-TIME:20220321T133000Z DTEND;VALUE=DATE-TIME:20220321T134500Z DTSTAMP;VALUE=DATE-TIME:20260308T042632Z UID:indico-contribution-109-2191@indico.tlabs.ac.za DESCRIPTION:Speakers: Neil McCauley (University of Liverpool)\nT2K is a lo ng baseline experiment providing world-leading measurements of the paramet ers governing neutrino oscillation. \nT2K data enable first 3sigma exclusi on for some intervals of the CP-violating phase $\\delta_{CP}$ and precisi on measurements of the atmospheric parameters $\\Delta m^{2}_{32}$\, $\\si n^2(\\theta_{23}$).\nT2K exploits a beam of muon neutrinos and antineutrin os at the Japan Particle Accelerator Research Centre (JPARC) and it measur es oscillations by comparing neutrino rates and spectra\nat a near detecto r complex\, located at JPARC\, and at the water-cherencov detector SuperKa miokande\, located 295 Km away.\nThe T2K beam will be upgraded with increa sed power in 2022 and an upgrade of the ND280 near detector\, located 2.5 degrees off-axis\, is being assembled to exploits the increased statistics .\nMoreover the SuperKamiokande detector has been loaded with 0.01% of Gad olinium in 2020\, enabling enhanced neutron tagging. \nIn preparation for the exploitation of such data\, the T2K collaboration is working on an upd ated oscillation analysis to improve the control of systematic uncertainti es \nA new beam tuning has been developed\, based on an improved NA61/SHIN E measurement on a copy of the T2K target and including a refined modeling of the beam line materials. \nNew selections at ND280\, with proton and photon tagging\, and at Super Kamiokande\, extending pion tagging to muon neutrino samples\, have been developed. \nAfter reviewing the latest measu rements of oscillation parameters\, the status of such new developments an d the plan to deploy the beam and ND280 upgrade will be presented.\n\nhttp s://indico.tlabs.ac.za/event/109/contributions/2191/ LOCATION: URL:https://indico.tlabs.ac.za/event/109/contributions/2191/ END:VEVENT END:VCALENDAR