BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:- DTSTART;VALUE=DATE-TIME:20200227T123000Z DTEND;VALUE=DATE-TIME:20200227T125000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1540@indico.tlabs.ac.za DESCRIPTION:https://indico.tlabs.ac.za/event/85/contributions/1540/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1540/ END:VEVENT BEGIN:VEVENT SUMMARY:Hints of non-unitarity in the present T2K and NO$\\nu$A data DTSTART;VALUE=DATE-TIME:20200227T121000Z DTEND;VALUE=DATE-TIME:20200227T123000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1452@indico.tlabs.ac.za DESCRIPTION:Speakers: Ushak Rahaman (University of Johannesburg)\nThe mixi ng of three neutrino flavours is parameterised by the unitary\nPMNS matrix . If there are more than three neutrino flavours\, effective $3\\times 3$ neutrino mixing\nmatrix will be non-unitary. In this paper\, we have analy sed the \nlatest T2K and NO$\\nu$A data with the hypothesis of non-unitary mixing matrix.\nPresent results from NO$\\nu$A and T2K collaboration have tension between them as NO$\\nu$A disfavours T2K\nbest-fit point at $1\\\ , \\sigma$ confidence level and vice versa. In this paper we have shown th at latest data from both the\nexperiments disfavour unitary $3\\times 3$ m ixing at $60\\%$ C.L. The combined analysis disfavours unitary mixing\nat $1\\\, \\sigma$ C.L. Moreover\, the tension between two experiments can al so be reduced with the non-unitary approach.\n\nhttps://indico.tlabs.ac.za /event/85/contributions/1452/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1452/ END:VEVENT BEGIN:VEVENT SUMMARY:127I(nu\,e)127Xe reaction for solar neutrino spectrum clarificatio n DTSTART;VALUE=DATE-TIME:20200225T124000Z DTEND;VALUE=DATE-TIME:20200225T130000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1552@indico.tlabs.ac.za DESCRIPTION:Speakers: Almaz Fazliakhmetov (MIPT)\nSolar neutrino spectrum measurement plays a crucial role for solar metallicity determination. 127I (nu\,e)127Xe reaction is sensitive to CNO and boron components of the sola r neutrino spectrum due to the relatively high threshold (662 KeV). \nFor neutrinos with energies upper S_n = 7.246 MeV 127I(nu\,e) capture produces 126Xe + n. The concentration ratio of 127Xe and 126Xe could clarify param eters of high energy solar neutrino spectrum and neutrino oscillations. We present production rate estimation for of 127Xe and 126Xe based on experi mental strength function from 127I(p\,n)Xe reaction.\n\nhttps://indico.tla bs.ac.za/event/85/contributions/1552/ LOCATION:Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1552/ END:VEVENT BEGIN:VEVENT SUMMARY:The CROSS experiment: rejecting surface events with PSD DTSTART;VALUE=DATE-TIME:20200225T122000Z DTEND;VALUE=DATE-TIME:20200225T124000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1462@indico.tlabs.ac.za DESCRIPTION:Speakers: Hawraa Khalife (CSNSM-cnrs (orsay\, France))\nNeutri noless double-beta decay is a hypothetical rare nuclear transition (T^1/2> 1026 y). Its observation would provide an important insight about the natu re of neutrinos (Dirac or Majorana particle) demonstrating that the lepton number is not conserved. This decay can be investigated with bolometers e mbedding the double beta decay isotope\, the possibility to investigate th is rare process is strongly influenced by the background level in the regi on of interest. A new R&D has recently begun within the CROSS project (Cry ogenic Rare-event Observatory with Surface Sensitivity) aiming at the deve lopment of bolometric detectors\, embedding the promising isotopes 100Mo a nd 130Te\, capable of discriminating surface alpha and beta interactions b y exploiting the properties of superconducting material (Al film) or norma l metal (Pd film) deposited on the crystal faces (Li2MoO4 and TeO2). These films work as pulse-shape modifiers. The results of the tests on prototyp es performed at CSNSM (Orsay\, France) showed the capability of a few-µm (nm)-thick Al (Pd) film deposited on the crystal surface to discriminate s urface from bulk events\, with the required rejection level of the surface background. While Al film can only identify surface alpha particles\, the re are preliminary indications that normal-metal films can separate also t he beta surface component. This is a breakthrough in bolometric technology for double beta decay that could lead to reach a background index in the range 10^-5 counts/(keV kg y). The CROSS cryostat has been recently instal led underground (Canfranc\, Spain). We plan to run the first CROSS demonst rator in 2021 with 32 enriched Li2100MoO4 crystals containing ~5 kg of 100 Mo. A 5-year sensitivity to the effective Majorana neutrino mass mββ wit h a background of the order of 10^-3 counts /(keV kg y) would be in the ra nge 68-122 meV (2.8 × 10^25 y)\, at the level of the best currently runni ng experiments.\n\nhttps://indico.tlabs.ac.za/event/85/contributions/1462/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1462/ END:VEVENT BEGIN:VEVENT SUMMARY:Update on the HOLMES experiment to directly measure the neutrino m ass DTSTART;VALUE=DATE-TIME:20200225T134000Z DTEND;VALUE=DATE-TIME:20200225T140000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1466@indico.tlabs.ac.za DESCRIPTION:Speakers: Marco Faverzani ()\nThe absolute neutrino mass is st ill a missing parameter in the modern landscape of particle physics. The H OLMES experiment aims at exploiting the calorimetric approach to directly measure the neutrino mass through the kinematic measurement of the decay p roducts of the weakly-mediated decay of 163Ho. This low energy decaying is otope\, in fact\, undergoes electron capture emitting a neutrino and leavi ng its daughter nucleus\, 163Dy*\, in an atomic excited state. This\, in t urn\, relaxes by emitting electrons and\, to a considerably lesser extent\ , photons. The high energy portion of the calorimetric spectrum of this de cay is affected by the non-vanishing neutrino mass value. Given the small fraction of events falling in the region of interest\, to achieve a high e xperimental sensitivity on the neutrino mass it is important to have a hig h activity combined with a very small undetected pile-up contribution. To achieve these targets\, the final configuration of HOLMES foresees the dep loyment of a large number of 163Ho ion-implanted TESs characterized by an ambitiously high activity of 300 Hz each. This contribution will provide a n overview on the status of the major tasks that will bring HOLMES to achi eve a statistical sensitivity on the neutrino mass as low as 2 eV: from th e isotope production and embedding to the detector production and readout. \n\nhttps://indico.tlabs.ac.za/event/85/contributions/1466/ LOCATION:Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1466/ END:VEVENT BEGIN:VEVENT SUMMARY:Theoretical description of half-lives and electron spectra for hig her order forbidden non-unique $\\beta$ decays DTSTART;VALUE=DATE-TIME:20200224T124000Z DTEND;VALUE=DATE-TIME:20200224T130000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1459@indico.tlabs.ac.za DESCRIPTION:Speakers: Anil Kumar (Indian Institute of Technology\, Roorkee \, India)\n**Theoretical description of half-lives and electron spectra fo r higher order forbidden non-unique $\\beta$ decays**\n\nAnil Kumar and Pr aveen C. Srivastava\n\nDepartment of Physics\, Indian Institute of Technol ogy Roorkee\,\nRoorkee 247 667\, India\n\n \nIn this work we have calculat ed log$ft$ and half-lives values of the higher order forbidden $\\beta$-de cays for selected nuclei [for e.g. $^{87}$Rb($3/2^-$) $\\rightarrow$ $^{8 7}$Sr($9/2^+$)] in the framework of the nuclear shell model [1-3]. In the present study\, we have included next-to-leading-order terms [4-6] in the shape functions to see their effect in the calculated half-lives and $\\b eta$ (or electron) spectra. The role of effective value of axial-vector co upling constant ($g_A$) in half-lives and $\\beta$ spectra for higher-forb idden beta decay are very important. The $\\beta^-$-spectrum of the fourth -forbidden non-unique decays of $^{113}$Cd and $^{115}$In strongly depends on the effective value of $g_A$ [4\,7]. In our study we will report the spectrum-shape method (SSM) for electron spectra with the effective value of $g_A$. With the SSM\, it is possible to extract information of effecti ve value of the weak coupling constant by comparing the theoretical and ex perimental $\\beta$ electron spectra of forbidden non-unique $\\beta$-dec ays.\n\n\n[1] H. Behrens and W. Bühring\, Electron Radial Wave Functions\ nand Nuclear Beta-decay (Clarendon Press\, Oxford\, 1982).\n\n[2] H. F. Sc hopper\, Weak Interactions and Nuclear Beta Decay\n(North-Holland\, Amster dam\, 1966).\n\n[3] J. Suhonen\, From Nucleons to Nucleus: Concepts of Mic roscopic\nNuclear Theory (Springer\, Berlin\, 2007).\n\n[4] M. Haaranen\, J. Kotila and J. Suhonen\, Spectrum-shape method and the next-to-leading-o rder terms of $\\beta$-decays shape factor\, Phys. Rev. C {\\bf 95}\, 024 327 (2017).\n\n[5] M.Haaranen\, P. C. Srivastava and J. Suhonen\, Forbidde n nonunique $\\beta$ decays and effective values of coupling constants\, P hys. Rev. C {\\bf 93}\, 034308 (2016). \n\n[6] J. Kostensalo\, M. Haaranen \, and J. Suhonen\, Electron spectra in forbidden $\\beta$ decays and the quenching of the weak axial-vector coupling constant $g_A$\, Phys. Rev. C {\\bf 95}\, 044313 (2017).\n\n\n[7] M. T. Mustonen\, M. Aunola\, and J. Su honen\, Theoretical description of the fourth-forbidden non-unique $\\beta $ decays of $^{113}$Cd and $^{115}$In\, Phys. Rev. C {\\bf 73}\,\n054301 ( 2006).\n\nhttps://indico.tlabs.ac.za/event/85/contributions/1459/ LOCATION:Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1459/ END:VEVENT BEGIN:VEVENT SUMMARY:The search for eV sterile neutrinos with the STEREO experiment DTSTART;VALUE=DATE-TIME:20200228T070000Z DTEND;VALUE=DATE-TIME:20200228T072000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1467@indico.tlabs.ac.za DESCRIPTION:Speakers: Helena Almazan (Max-Planck-Institut fuer Kernphysik) \nIn the last decade\, two unsolved anomalies have appeared from the study of reactor neutrinos: one related to the neutrino spectral shape\, and an other to the absolute neutrino flux. The second one\, known as the Reactor Antineutrino Anomaly\, presents a deficit in the observed flux compared t o the expected one that could point to the existence of a light sterile ne utrino in the eV range participating in the oscillation phenomena.\nThe ST EREO experiment is a short baseline reactor antineutrino experiment trying to test the existence of those sterile neutrinos. This experiment\, takin g data since the end of 2016\, measures the antineutrino energy spectrum f rom the compact core of the research reactor of the Institut Laue-Langevin (Grenoble\, France) operated with highly enriched U-235 fuel. Covering ba selines between 9 and 11m with a segmented neutrino target\, STEREO can st udy the rate of neutrino interactions and compare it among cells to test o scillation hypotheses at different distances from the source. STEREO can a lso measure the absolute neutrino flux and spectral shape emitted from a p ure U-235 core.\nNeutrino data from 179 (235) days of reactor turned on (o ff) have been analyzed\, showing compatibility with the null oscillation h ypothesis and rejecting the best fit point of the Reactor Antineutrino Ano maly at 99.8% C.L. In this talk\, these results together with the latest i mprovements in the description of the detector models and the background t reatment are reported\, providing a crucial input in the search for steril e neutrinos.\n\nhttps://indico.tlabs.ac.za/event/85/contributions/1467/ LOCATION:Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1467/ END:VEVENT BEGIN:VEVENT SUMMARY:COHERENT’s Neutrino-Induced Neutron Detectors DTSTART;VALUE=DATE-TIME:20200225T134000Z DTEND;VALUE=DATE-TIME:20200225T140000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1474@indico.tlabs.ac.za DESCRIPTION:Speakers: Samuel Hedges (Duke University)\nNeutrino-nucleus in teractions can produce excited nuclear states that can de-excite by emitti ng particles\, including neutrons. Neutrino-induced neutrons (NINs) produc ed in common gamma shielding material\, such as lead or iron\, can pose a background for neutrino and dark matter experiments. Additionally\, NIN pr oduction in lead is the primary mechanism for the Helium and Lead Observat ory (HALO) to detect supernova neutrinos\, and iron-based supernova NIN de tectors have been proposed. As part of the COHERENT experiment\, two detec tors seeking to study NIN production in lead and iron have been deployed t o the Spallation Neutron Source (SNS). An overview of the detector design and current status will be presented.\n\nhttps://indico.tlabs.ac.za/event/ 85/contributions/1474/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1474/ END:VEVENT BEGIN:VEVENT SUMMARY:Borexino solar neutrino data as a probe of non-standard neutrino p roperties DTSTART;VALUE=DATE-TIME:20200225T120000Z DTEND;VALUE=DATE-TIME:20200225T122000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1477@indico.tlabs.ac.za DESCRIPTION:Speakers: Alina Vishneva (JINR)\nNeutrinos produced in the Sun can be used as a probe of neutrino physics beyond the Standard Model (BSM ). In this study\, two BSM processes are considered\, namely\, non-standar d neutrino-electron interactions\, and electromagnetic neutrino interactio n caused by an anomalous magnetic moment. These processes may occur during both neutrino propagation through the solar matter and detection\, causin g distortions in solar neutrino fluxes\, survival probability\, interactio n cross sections and other properties. In the Borexino experiment\, possib le impacts of the non-standard interactions of solar neutrinos to the data have been estimated using both interaction rate and spectral information. For the anomalous neutrino magnetic moment study\, both neutrino and anti -neutrino datasets have been considered.\n\nhttps://indico.tlabs.ac.za/eve nt/85/contributions/1477/ LOCATION:Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1477/ END:VEVENT BEGIN:VEVENT SUMMARY:GT Nuclear resonances for 71Ga(nu\,e)71Ge reaction investigation DTSTART;VALUE=DATE-TIME:20200228T072000Z DTEND;VALUE=DATE-TIME:20200228T074000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1551@indico.tlabs.ac.za DESCRIPTION:Speakers: Grigory Koroteev (Moscow Institute of Physics and Te chnology)\nNeutrino-matter interaction has great importance for neutrino p hysics and astrophysics. Neutrino capture cross-section depends on the str ucture of the target nucleus strength function. 71Ga(v\,e)71Ge process cou ld be analysed using the charge-exchange strength functions of 71Ga(p\,n)7 1Ge and 71Ga(3He\,t)71Ge reactions. Nuclear phenomenology of charge-exchan ge reactions describes not only discrete excited levels\, but also collect ive resonant states such as GTR and pygmy-resonances. It is shown that acc ounting of GT-resonances increase neutrino capture rate and that capture r ate is very sensitive to the exact behavior of the Fermi function at low e nergies. We will discuss the quenching effect estimation and the accuracy of B(GT) extraction from experimental data as a function of resonance widt h. The talk proposes a comparison of the experimental data processing and calculations obtained in the framework of the self-consistent theory of fi nite Fermi systems.\n\nhttps://indico.tlabs.ac.za/event/85/contributions/1 551/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1551/ END:VEVENT BEGIN:VEVENT SUMMARY:Searching for neutrinoless double beta of 100Mo: the CUPID-Mo expe riment DTSTART;VALUE=DATE-TIME:20200224T120000Z DTEND;VALUE=DATE-TIME:20200224T122000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1481@indico.tlabs.ac.za DESCRIPTION:Speakers: Claudia Nones ()\n$^{100}$Mo deployed in the form of enriched Li$_{2}$ MoO$_{4}$ crystals can be used as a promising scintilla ting bolometer to search for 0$\\nu\\beta\\beta$ in a tonne-scale experime nt. In this talk we will review the properties of this target crystal and achieved bolometric detector performances that make it the baseline choice for CUPID (CUORE Upgrade with Particle ID).\nCUPID-Mo\, installed in the underground laboratory of Modane\, consists of an array of 20 enriched ~0. 2 kg Li2MoO4 crystals equipped with 20 cryogenic Ge bolometers to discrimi nate alpha from beta/gamma events by the detection of both heat and scinti llation light signals. The commissioning has started in december 2018 and we have switched to routine data taking in spring 2019. In this talk\, we will present results confirming an excellent bolometric performance of $\ \sim$5-6 keV energy resolution (FWHM) at 2615 keV\, full alpha to beta gam ma separation and improved estimates on the radiopurity of the crystals. W e will also report on the background level observed in the region of inter est and give a competitive limit on the neutrinoless double-beta decay hal f-life of Mo-100 as well the most precise measurement of the 2-neutrino de cay mode. We will conclude with an expectation of the sensitivity of CUPID -Mo and prospects for CUPID.\n\nhttps://indico.tlabs.ac.za/event/85/contri butions/1481/ LOCATION:Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1481/ END:VEVENT BEGIN:VEVENT SUMMARY:NEON - Neutrino Elastic-scattering Observation with NaI(Tl) DTSTART;VALUE=DATE-TIME:20200225T132000Z DTEND;VALUE=DATE-TIME:20200225T134000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1485@indico.tlabs.ac.za DESCRIPTION:Speakers: Hyun Su Lee (Institute for Basic Science)\nNEON is a proposed experiment to detect coherent elastic neutrino-nucleus scatterin g (CENNS) with high light yield NaI(Tl) detectors and a reactor as antinue trino source. Due to extremely low energy signal predicted from the CENNS process\, one needs to develop extremely low threshold detectors. We have optimized size of the crystals and developed new optical coupling design f or high light collection efficiency. With current best crystal of approxim ately 23 photoelectrons per keV\, a sub-keV scintillation signal is access ible with the NaI(Tl) crystals. We consider to install approximately 10~kg target mass at Hanbit reactor power plant\, which is same place of the NE OS short baseline neutrino experiment\, in early 2020. The site is 24 m f ar from reactor core with measured antineutrino flux of 7$\\times$10$^{-12 }$/cm$^2$/s. We will present current status of detector developments as we ll as our strategy for an observation of CENNS process with the reactor an tineutrino.\n\nhttps://indico.tlabs.ac.za/event/85/contributions/1485/ LOCATION:Main Venue and Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1485/ END:VEVENT BEGIN:VEVENT SUMMARY:Tests of three-neutrino paradigm by MINOS and MINOS+ Experiments DTSTART;VALUE=DATE-TIME:20200227T113000Z DTEND;VALUE=DATE-TIME:20200227T115000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1484@indico.tlabs.ac.za DESCRIPTION:Speakers: Karol Lang (University of Texas at Austin)\nMINOS an d MINOS+ experiments collected unprecedented amount of data using two long baseline detectors that operated on axis of the NuMI neutrino beam at Fer milab. This has allowed to conduct some of the best measurements of neutri no oscillations that provide stringent constraints on neutrino mixing and transitions involving sterile neutrinos. We will present the latest result s from these studies.\n\nhttps://indico.tlabs.ac.za/event/85/contributions /1484/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1484/ END:VEVENT BEGIN:VEVENT SUMMARY:Status and prospects of the KM3NeT/ORCA DTSTART;VALUE=DATE-TIME:20200227T123000Z DTEND;VALUE=DATE-TIME:20200227T125000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1471@indico.tlabs.ac.za DESCRIPTION:Speakers: Salvador Miranda Palacios (University of Johannesbu rg)\nKM3NeT is the next-generation neutrino Cherenkov telescope currently under construction in the Mediterranean Sea. Its low energy configuration ORCA (Oscillations Research with Cosmics in the Abyss) is optimised for th e detection of atmospheric neutrinos with energies above ∼1 GeV. The mai n research target of the ORCA detector is the measurement of the neutrino mass ordering (NMO) and atmospheric neutrino oscillation parameters. This contribution will present the first results on atmospheric neutrinos detec ted with the already deployed ORCA detection units. The projected sensitiv ity of the detector to the NMO will be shown\, alongside prospects for ear ly analyses of data collected with a small sub-array of the detector durin g construction phase. The ORCA potential for other physics topics\, includ ing dark matter\, non-standard interactions\, sterile neutrinos\, and supe rnovae neutrino detection will also be presented.\n\nhttps://indico.tlabs. ac.za/event/85/contributions/1471/ LOCATION:Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1471/ END:VEVENT BEGIN:VEVENT SUMMARY:Sensitivity to the neutrinoless double beta decay of the DARWIN ob servatory DTSTART;VALUE=DATE-TIME:20200225T120000Z DTEND;VALUE=DATE-TIME:20200225T122000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1464@indico.tlabs.ac.za DESCRIPTION:Speakers: Patricia Sanchez-Lucas (University of Zurich)\nThe D ARWIN observatory is a proposed next-generation experiment whose primary g oal is to search for particle dark matter. It will operate 50 tonnes of na tural xenon in a dual-phase time projection chamber under ultra-low backgr ound conditions. These two characteristics make DARWIN sensitive to other rare interactions\, like the neutrinoless double beta decay of the isotope Xe136. Without isotopic enrichment DARWIN will contain in total more than 4.5t of Xe136. We present here the expected half-life sensitivity for thi s rare decay. This sensitivity is based on a detailed study of attainable backgrounds\, Monte Carlo predictions and event topologies in the homogene ous target. We show that DARWIN will be comparable in its science reach to dedicated double beta decay experiments using enriched Xe136.\n\nhttps:// indico.tlabs.ac.za/event/85/contributions/1464/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1464/ END:VEVENT BEGIN:VEVENT SUMMARY:- DTSTART;VALUE=DATE-TIME:20200224T130000Z DTEND;VALUE=DATE-TIME:20200224T132000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1525@indico.tlabs.ac.za DESCRIPTION:https://indico.tlabs.ac.za/event/85/contributions/1525/ LOCATION:Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1525/ END:VEVENT BEGIN:VEVENT SUMMARY:GERDA Highlights: Probing the Majorana Neutrino Mass at 100 meV DTSTART;VALUE=DATE-TIME:20200225T132000Z DTEND;VALUE=DATE-TIME:20200225T134000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1463@indico.tlabs.ac.za DESCRIPTION:Speakers: Luciano Pandola (INFN - Laboratori Nazionali del Sud )\nSince 2010\, the GERDA project has been operated at Laboratori Nazional i del Gran Sasso (LNGS)\, searching for the neutrinoless double beta deca y (0νββ) of Ge-76 to Se-76. GERDA is nowadays completing its mission\, having attained 100 kgy exposure and\, as first experiment\, surpassed the goal sensitivity of 10^26 yr on the half-life of the searched process. Si nce its beginning in 2010 GERDA has increased its sensitivity for the meas urement of the decay by almost a factor of 5\, thanks to excellent passive shield setup\, operating procedures\, energy resolution\, and implementat ion of active background suppression strategies. The GERDA results allow t o directly probe the Majorana neutrino mass down to about 100 meV scale.\n In this talk\, the GERDA setup\, technological features and operation will be summarized\, and the above outlined results\, based on an exposure of about 85 kgy\, will be reviewed in the framework of results from other 0ν ββ players. The Ge-76 two neutrino double beta decay half-life measured by GERDA\, the main detected background sources\, the performances and ba ckground indexes for the different detector types\, the data analysis flow and algorithms will be discussed as well.\nThe perspectives of the final GERDA data release and the transition to the LEGEND project will be addres sed.\n\nhttps://indico.tlabs.ac.za/event/85/contributions/1463/ LOCATION:Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1463/ END:VEVENT BEGIN:VEVENT SUMMARY:Axial Vector Form Factors of the Nucleon using lattice QCD DTSTART;VALUE=DATE-TIME:20200228T080000Z DTEND;VALUE=DATE-TIME:20200228T082000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1514@indico.tlabs.ac.za DESCRIPTION:Speakers: Rajan Gupta (Los Alamos National Laboratory)\nThe su ccess of experiments such as DUNE require the determination of neutrino fl ux and cross-section with nuclear targets with unprecedented accuracy. A c rucial input in the calculations of these is the axial form factor. Starti ng from the standard model that defines the interaction of the axial curre nt with quarks\, one needs to include both QCD corrections that bind quark s into nucleons and nuclear effects that arise in heavy nuclear targets su ch as argon. Experimental access to the first\, QCD corrections for nucle ons\, is prevented by safety concerns posed by liquid hydrogen targets. Ax ial and electromagnetic form factors of the nucleon can be calculated from first principals using lattice QCD. This talk will show that we now have control over all sources of systematic errors that arise in lattice QCD c alculations and the axial form factors satisfy the PCAC relation\, an esse ntial and non-trivial check [see arXiv:1905.06470]. Finally\, I will prese nt state-of-the-art results at the physical pion mass and in the continuum limit and compare them with phenomenology. Prospects for reaching 1–2% accuracy will be discussed.\n\nhttps://indico.tlabs.ac.za/event/85/contrib utions/1514/ LOCATION:Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1514/ END:VEVENT BEGIN:VEVENT SUMMARY:Decay Characteristics of the Scissors Mode of 0νββ-Decay Partne r Isotopes* DTSTART;VALUE=DATE-TIME:20200228T070000Z DTEND;VALUE=DATE-TIME:20200228T072000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1486@indico.tlabs.ac.za DESCRIPTION:Speakers: Jörn Kleemann (AG Pietralla Institut für Kernphysi k Technische Universität Darmstadt)\nThe search for neutrinoless double b eta (0νββ) decay\, a process only allowed if the neutrino were a Majora na particle\, recently gained much attention with numerous experiments bei ng dedicated to its observation. It would demonstrate lepto-genesis in the universe and allow the determination of the neutrino mass from its decay rate. However\, to quantitatively extract the neutrino mass or estimate de cay rates a nuclear matrix element (NME) is required\, which has to be cal culated using nuclear structure models. One of them is the Interacting Bos on Model 2 (IBM-2)\, which will be discussed below. Those calculations can be difficult because many of the 0νββ-decay candidate nuclei lie in re gions of the nuclear chart that feature shape coexistence\, with the hypot hesized 0νββ-decay mother nucleus ¹⁵⁰Nd and its daughter ¹⁵⁰S m even being located in the region of a shape phase transition along their respective isotopic chains. In particular\, the occurrence of shape coexi stence may lead to a significant population of an excited 0⁺ state in 0 νββ decay. To improve 0νββ-NME calculations for ¹⁵⁰Nd and ¹⁵ ⁰Sm within the IBM-2 information on its so-called Majorana interaction i s needed. Therefore\, new data on the decay characteristics of the scissor s mode of these nuclei was recently taken in nuclear resonance fluorescenc e experiments performed at the High Intensity γ-ray Source. The decay cha racteristics of the scissors mode are sensitive to the nuclear deformation and allow inducing constraints on model parameters\, especially the Major ana parameters of the IBM-2\, in turn resulting in a more reliable predict ion of the 0νββ-NME. Similar information has also been obtained for the 0νββ-partner nuclides ⁸²Se and ⁸²Kr. The experimental results an d updated IBM-2 calculations will be presented and discussed.\n*Supported by the DFG through the research grant SFB 1245 and by the State of Hesse u nder the grant “Nuclear Photonics” within the LOEWE program.\n\nhttps: //indico.tlabs.ac.za/event/85/contributions/1486/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1486/ END:VEVENT BEGIN:VEVENT SUMMARY:Deflection of cosmic neutrino by a stellar magnetic field DTSTART;VALUE=DATE-TIME:20200227T115000Z DTEND;VALUE=DATE-TIME:20200227T121000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1442@indico.tlabs.ac.za DESCRIPTION:Speakers: Mohamed Ismaiel (Helwan University)\nNeutrinos in t he Standard Model (SM) are considered neutral particles. However\, recent experiments showed that the neutrino has infinitesimal electric charge lea ds to non-zero magnetic moment (μ) with precise constraints on the value\ , this electromagnetic interaction contribution enhances neutrino properti es i.e. Oscillation\, Scattering\, and Spin. This work discusses the possi ble neutrino deflection under the influence of Interstellar Magnetic Field (IMF) or at extreme magnetic field condition exists in celestial objects\ , and for what limit could affect the neutrino flux measured at Earth. The primary results were validated by SN1987A supernovae arrival time data.\n \nhttps://indico.tlabs.ac.za/event/85/contributions/1442/ LOCATION:Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1442/ END:VEVENT BEGIN:VEVENT SUMMARY:Prospects for pair-transfer reactions at iThemba LABS DTSTART;VALUE=DATE-TIME:20200225T124000Z DTEND;VALUE=DATE-TIME:20200225T130000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1443@indico.tlabs.ac.za DESCRIPTION:Speakers: Philip Adsley (iThemba LABS/Wits)\nPair-transfer rea ctions such as (p\,t) and (3He\,n) have been used to probe the pairing in nuclei. The nature of pairing in neutrinoless double-beta decay candidates can strongly impact the predicted nuclear matrix elements linking the gro und states of the parent and daughter nuclei in neutrinoless double-beta d ecay candidates\, with various different theoretical approaches such as th e QRPA sometimes using the BCS pairing approximation. Evidence from pair-t ransfer reactions provides evidence for the breaking down of the BCS appro ximation in some nuclei.\n\nThis contribution will discuss experimental de velopments at iThemba LABS using the K600 magnetic spectrometer to measure (p\,t) cross sections\, and arrays of HPGe and neutron detectors to measu re the (3He\,n) reaction\, providing an excellent opportunity to probe the nature of pairing in nuclei\, including neutrinoless double-beta decay ca ndidates.\n\nhttps://indico.tlabs.ac.za/event/85/contributions/1443/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1443/ END:VEVENT BEGIN:VEVENT SUMMARY:Calculation of the neutrino-nuclear reaction cross-sections for 𝑮𝒆𝟕𝟔 nuclei and estimation of the solar neutrino background in the GERDA/LEGEND experiments. DTSTART;VALUE=DATE-TIME:20200228T074000Z DTEND;VALUE=DATE-TIME:20200228T080000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1555@indico.tlabs.ac.za DESCRIPTION:Speakers: Andrei Vyborov (Moscow Institute of Physics and Tech nology)\nThe work presents calculations of the neutrino-nuclear reaction c ross-sections using the\nexample of the nucleus 𝐺𝑒'( (𝐺𝑒'( 𝜈*\, 𝑒 𝐴𝑠'( ). In the structure of the nucleus\, not only\ndis crete\, but also continuous states formed due to the collective interactio n of nucleons were\ndistinguished. In particular\, the contribution of the Giant Gamow-Teller resonance and so-called\npygmy resonances in the captu re rate of solar neutrinos was estimated (an increase of 25% to\n50%\, dep ending on the quenching parameter used).\nBased on the obtained capture ra te\, a Monte Carlo simulation of the subsequent beta\ndecay of the nucleus 𝐴𝑠'( (𝐴𝑠'( → 𝑆𝑒'( + 𝑒2 + 𝜈* + 𝑛𝛾) was car ried out for germanium\ndetectors in the GERDA experiment. Thus\, the cont ribution of the background component due\nto solar neutrinos was estimated \, which\, due to the small cross-sections of neutrino-nuclear\nreactions\ , is practically unremovable\, imposing confines on the sensitivity limit of the setup.\nA similar assessment can be made for the upcoming LEGEND ex periment taking into\naccount its geometry. Preliminary results suggest th at BI of solar neutrinos are 1-2 orders of\nmagnitude lower than the predi cted accuracy of the LEGEND experiment.\n\nhttps://indico.tlabs.ac.za/even t/85/contributions/1555/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1555/ END:VEVENT BEGIN:VEVENT SUMMARY:Enlightening the dark with XENON1T and looking forward to XENONnT DTSTART;VALUE=DATE-TIME:20200224T130000Z DTEND;VALUE=DATE-TIME:20200224T132000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1518@indico.tlabs.ac.za DESCRIPTION:Speakers: Christian Wittweg ()\nThe most recent results of the XENON1T direct dark matter detector will be presented. XENON1T was a two- phase xenon TPC using 248 low radioactivity PMTs to detect scintillation s ignals in a 2-ton active liquid xenon target. The detector was operational between 2016 and 2018 at the Laboratori Nazionale del Gran Sasso with con tinuously improving xenon purity and reduction of the internal Kr-85 backg round source. In addition to WIMP searches\, XENON1T also produced importa nt results on nuclear processes\, such as the double electron capture of 1 24Xe\, and is sensitive to flavour independent measurements of solar and s upernova neutrinos. The status of the successor experiment\, XENONnT will be discussed\, as well as projections for WIMP and neutrinoless double be ta decay searches.\n\nhttps://indico.tlabs.ac.za/event/85/contributions/15 18/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1518/ END:VEVENT BEGIN:VEVENT SUMMARY:ReD: a SiPM based LAr TPC for directionality studies DTSTART;VALUE=DATE-TIME:20200224T132000Z DTEND;VALUE=DATE-TIME:20200224T134000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1469@indico.tlabs.ac.za DESCRIPTION:Speakers: Luciano Pandola (INFN - Laboratori Nazionali del Sud )\nThe Recoil Directionality project (ReD) within the DarkSide Collaborati on aims to characterize the light and charge response of a liquid argon (L Ar) dual-phase Time Projection Chamber (TPC) to neutron-induced nuclear re coils. The main goal of the project is to probe for the possible direction al dependence suggested by the SCENE experiment. Furthermore\, ReD will ha ve the possibility to study the response of a LAr TPC to very low-energy n uclear recoils. Sensitivity to directionality and to low-energy recoils ar e both key assets for future argon-based experiments looking for Dark Matt er in the form of WIMPs.\n\nReD consists in the irradiation of a miniaturi zed LAr TPC with a neutron beam at the INFN\, Laboratori Nazionali del Sud (LNS)\, Catania. Neutrons are produced via the reaction p($^7$Li\,$^7$Be) n from a primary $^7$Li beam delivered by the TANDEM accelerator of LNS. A $\\Delta$E/E telescope\, made by two Si detectors\, identifies the charge d particles ($^7$Be) which accompany the neutrons emitted towards the TPC. The core detector of ReD is a small custom-made double phase LAr TPC\, ha ving sensitive volume of 5×5×5 cm$^3$. The ReD TPC uses all the innovati ve features of the DarkSide-20k design: in particular the optoelectronic r eadout based on SiPM and the cryogenic electronics. It is thus a valuable test bench of the technology which is being developed for DarkSide-20k and for the future project Argo. Neutrons scattered from the TPC are eventual ly detected by using an array of nine 3-inch liquid scintillator (LSci) de tectors. All LSci are placed such to tag recoils having the same energy\, i.e. the same scattering angle with respect to the incident neutron\, but different angle with respect to the drift field of the LAr TPC\, thus allo wing to search for a possible directional response. \nThe integration of t he three detector systems was performed within several test beams performe d in 2018-2019\, using the TANDEM accelerator of LNS. Neutrons were produc ed by sending a $^7$Li 28 MeV beam onto a set of CH$_2$ targets having thi ckness between 250 and 400 $\\mu$g/cm$^2$. \n\nThe physics measurement is expected to take place during the early months of 2020. This contribution will report about the current status of the project\, including the physic s results possibly obtained in the meanwhile\, and on the short- and mediu m-term plans. The feasibility is also discussed of a wider-purpose facilit y at INFN-LNS\, targeted to the calibration of detectors of interest for D ark Matter or rare events searches with tagged neutrons.\n\nhttps://indico .tlabs.ac.za/event/85/contributions/1469/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1469/ END:VEVENT BEGIN:VEVENT SUMMARY:- DTSTART;VALUE=DATE-TIME:20200224T132000Z DTEND;VALUE=DATE-TIME:20200224T134000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1604@indico.tlabs.ac.za DESCRIPTION:https://indico.tlabs.ac.za/event/85/contributions/1604/ LOCATION:Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1604/ END:VEVENT BEGIN:VEVENT SUMMARY:Implications of new theoretical calculations on reactor antineutri no and gallium anomalies DTSTART;VALUE=DATE-TIME:20200228T072000Z DTEND;VALUE=DATE-TIME:20200228T074000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1446@indico.tlabs.ac.za DESCRIPTION:Speakers: Joel Kostensalo (University of Jyvaskyla\, Finland)\ nThe reactor antineutrino and gallium anomalies have been long unexplained . Possible explanations for both of these anomalies include new physics\, such as the existence of one or more eV-scale sterile neutrino [Ga15]. How ever\, the previous theoretical calculations\, which do not replicate the experimental results\, rely on many simplifying approximations [Ba97\,Ha19 ].\n\n\nIn the reactor-antineutrino analysis the beta decays contributing to the cumulative electron spectrum are usually assumed to have allowed sp ectral shapes. However\, many of these decays are actually first-forbidden . Moreover\, these decays dominate the experimentally observable region. I n some cases\, like in the case of the ground-state-to-ground-state decay of $^{140}\\rm Cs$ (see figure)\, this is found to be a rather poor approx imation. Based on the recent results\, the use of this allowed approximati on can at least partially explain the so called reactor antineurtino anoma ly.\n\nOur new large-scale shell model calculations regarding the neutrino -nucleus scattering cross section off $^{71}\\rm Ga$ shows no statistical difference to the experimental results of GALLEX and SAGE experiments. Con flict between charge-exchange BGTs and the neutrino-nucleus cross sections can to some extent be explained by destructive interference between Gamow -Teller and tensor contributions. A Bayesian approach to estimating the si gnificance of the gallium anomaly is discussed.\n\n![Allowed and forbidden spectral shapes for 140Cs.][1]\n\n\n[Ga15] S. Gariazzo\, C. Giunti\, M. L aveder\, Y. F. Li\, and\nE. M. Zavanin\, J. Phys. G: Nucl. Part. Phys. 43\ , 033001\n(2015).\n\n[Ba97] J. N. Bahcall Phys. Rev. C 56\, 3391 (1997).\n \n[Ha19] L. Hayen\, J. Kostensalo\, N. Severijns\, and J. Suhonen\nPhys. R ev. C 99\, 031301(R) (2019).\n\n\n [1]: https://ibb.co/QvQmNWQ\n\nhttps:/ /indico.tlabs.ac.za/event/85/contributions/1446/ LOCATION:Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1446/ END:VEVENT BEGIN:VEVENT SUMMARY:Q-value measurements of rare weak beta decays with JYFLTRAP DTSTART;VALUE=DATE-TIME:20200225T130000Z DTEND;VALUE=DATE-TIME:20200225T132000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1458@indico.tlabs.ac.za DESCRIPTION:Speakers: Tommi Eronen (University of Jyväskylä)\nRare weak beta decays can be potentially used in searches for the neutrino mass. The se are\, *e.g.*\, decays between nuclear ground states and excited states in daughter nuclei that have very small (< 1 keV) decay energy ($Q$-value ). The beta decay of $^{115}$In $9/2^+$ ground state to $3/2^+$ state in $ ^{115}$Sn currently has the smallest measured $Q$-value (0.155(24) keV [1\ ,2]) of any beta decay. \n\nThere are several more nuclei that potentially possess similarly low $Q$-values [3]. Those are optimal for experimental neutrino mass determination through distortions in the beta endpoint spect rum. First\, before any attempt to measure the endpoint spectrum\, it is n ecessary to confirm whether the $Q$-value of the decay is positive. The gr ound-state-to-ground state $Q$-value can be measured with mass spectrometr y while the excitation energy of the excited state in the daughter can be deduced from gamma-ray spectroscopy.\nUsing the JYFLTRAP Penning trap setu p [4\,5] at the Accelerator Laboratory of the University of Jyväskylä\, we have measured $Q$-values of several such cases. One of those is the $^{ 135}$Cs decay to $^{135}$Ba\, which was measured with a precision at the 1 00-eV level. Along with this Q-value measurement I’ll give an overview o f the used Phase-Imaging Ion-Cyclotron mass measurement technique [6].\n\n [1] B.J. Mount\, M. Redshaw\, E.G. Myers\, Phys. Rev. Lett. **103**\, 1225 02 (2009).\n[2] J. S. E. Wieslander\, J. Suhonen\, T. Eronen et al.\, Phys . Rev. Lett. **103**\, 122501 (2009).\n[3] H. Ejiri\, J. Suhonen\, K. Zube r\, Phys. Rep. **797**\, 1-102 (2019).\n[4] T. Eronen et al.\, Eur. Phys. J. A **48**\, 46 (2012).\n[5] D. Nesterenko et al.\, Eur. Phys. J. A **54* *\, 154 (2018).\n[6] S. Eliseev et al.\, Appl. Phys. B **114**\, 107 (2014 ).\n\nhttps://indico.tlabs.ac.za/event/85/contributions/1458/ LOCATION:Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1458/ END:VEVENT BEGIN:VEVENT SUMMARY:Dark Matter searches at Belle II DTSTART;VALUE=DATE-TIME:20200224T120000Z DTEND;VALUE=DATE-TIME:20200224T122000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1451@indico.tlabs.ac.za DESCRIPTION:Speakers: Marcello Campajola (INFN-Napoli)\nThe Belle II exper iment at the SuperKEKB energy-asymmetric $e^+ e^-$ collider is a substanti al upgrade of the B factory facility at the Japanese KEK laboratory. The d esign luminosity of the machine is $8\\times 10^{35}$ cm$^{-2}$s$^{-1}$ an d the Belle II experiment aims to record 50 ab$^{-1}$ of data\, a factor o f 50 more than its predecessor. Main operation of SuperKEKB has started in March 2019\, with the full detector installed\; this first running period ended in July. The machine reached a peak luminosity of $1.2\\times 10^{3 4}$ cm$^{-2}$s$^{-1}$\, and Belle II recorded a data sample of about 6.5 fb$^{-1}$. Data taking will resume in October 2019. Already this early dat a set\, with specifically designed triggers\, offers the possibility to se arch for a large variety of dark sector particles in the GeV mass range\, complementary to LHC and to dedicated low energy experiments\; these searc hes will benefit from more data which will be accumulated in the upcoming Fall/Winter run. This talk will review the state of the dark sector search es at Belle II with a focus on the discovery potential of the early data\, and show the first results\n\nhttps://indico.tlabs.ac.za/event/85/contrib utions/1451/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1451/ END:VEVENT BEGIN:VEVENT SUMMARY:Sterile neutrino searches with the ICARUS detector DTSTART;VALUE=DATE-TIME:20200227T115000Z DTEND;VALUE=DATE-TIME:20200227T121000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1455@indico.tlabs.ac.za DESCRIPTION:Speakers: Vincenzo Bellini (INFN/Catania)\nThe ICARUS collabor ation employed the 760-ton T600 detector in a successful three-year physic s run at the underground LNGS laboratories studying neutrino oscillations with the CNGS neutrino beam from CERN\, and searching for atmospheric neut rino interactions. ICARUS performed a sensitive search for LSND-like anoma lous $\\nu_e$ appearance in the CNGS beam\, which contributed to the const raints on the allowed parameters to a narrow region around 1 eV$^2$\, wher e all the experimental results can be coherently accommodated at 90% C.L. After a significant overhauling at CERN\, the T600 detector has now been p laced in its experimental hall at Fermilab where installation activities a re in progress. It will be soon exposed to the Booster Neutrino Beam to se arch for a sterile neutrino within the Short Baseline Neutrino (SBN) progr am\, devoted to definitively clarify the open questions of the presently o bserved neutrino anomalies. The proposed contribution will address ICARUS achievements\, its status and plans for the new run at Fermilab and the on going developments of the analysis tools needed to fulfill its physics pro gram.\n\nhttps://indico.tlabs.ac.za/event/85/contributions/1455/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1455/ END:VEVENT BEGIN:VEVENT SUMMARY:CUPID-0: a double-readout cryogenic detector for DBD DTSTART;VALUE=DATE-TIME:20200224T122000Z DTEND;VALUE=DATE-TIME:20200224T124000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1449@indico.tlabs.ac.za DESCRIPTION:Speakers: Lorenzo Pagnanini ()\nA convincing observation of ne utrino-less double beta decay (0𝜈DBD) relies on the possibility of oper ating high-energy resolution detectors in background-free conditions.\nSci ntillating cryogenic calorimeters are one of the most promising tools to f ulfill the requirements for a next-generation experiment. Several steps ha ve been taken to demonstrate the maturity of this technique\, starting for m the successful experience of CUPID-0.\nThe CUPID-0 experiment demonstrat ed the complete rejection of the dominant alpha background measuring the l owest counting rate in the region of interest for this technique. Furtherm ore\, the most stringent limit on the Se-82 0𝜈DBD was established runni ng 26 ZnSe crystals during two years of continuous detector operation.\nIn this contribution we present the final results of CUPID-0 Phase I includi ng a detailed model of the background\, the measurement of the 2𝜈DBD ha lf-life and the evidence that this nuclear transition is single state domi nated. The first results obtained after the upgrade of the detector in 201 9 are presented as well.\n\nhttps://indico.tlabs.ac.za/event/85/contributi ons/1449/ LOCATION:Main Venue and Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1449/ END:VEVENT BEGIN:VEVENT SUMMARY:DELight – Searching for light dark matter using superfluid heliu m DTSTART;VALUE=DATE-TIME:20200224T124000Z DTEND;VALUE=DATE-TIME:20200224T130000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1482@indico.tlabs.ac.za DESCRIPTION:Speakers: Christian Enss (Kirchhoff Institute for Physics\, He idelberg University)\nThe Direct search Experiment for Light Dark Matter ( DELight) aims to develop a novel detector technology for the search for li ght dark matter based on the properties of the superfluid phase of the ine rt gas 4He. This detector uses the purest material imaginable\, provides m ultiple independent signals for background suppression\, has the potential to exploit directionality for event identification\, and offers the abili ty to extend the sensitivity of direct dark matter search to the MeV range . In the first phase\, we will build a 10-liter prototype detector with me tallic magnetic calorimeters (MMCs) as photon and phonon sensors to invest igate the signal threshold that can be reliably detected and to study the directional dependence of the quantum evaporation of He atoms on the energ y and mass of the scattering particle. Here we will discuss the physics an d the potential of such a detector for light dark matter as well as the go als and long-term perspective of DELight.\n\nhttps://indico.tlabs.ac.za/ev ent/85/contributions/1482/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1482/ END:VEVENT BEGIN:VEVENT SUMMARY:EDELWEISS: searching for low-mass dark matter particles with germ anium low-temperature detectors DTSTART;VALUE=DATE-TIME:20200224T122000Z DTEND;VALUE=DATE-TIME:20200224T124000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1478@indico.tlabs.ac.za DESCRIPTION:Speakers: Andrea Giuliani (CNRS/CSNSM)\nEDELWEISS is a direct dark matter search experiment aiming at the detection of WIMPS and other c andidates as the composition of the galactic dark matter halo. The EDELWEI SS detection method is based on arrays of germanium mono-crystals operated at temperatures around or below 20 mK. Energy deposited in the crystals b y particle interactions are read out simultaneously by thermal sensors\, w hich collect the phonon component of the signal\, and by surface electrode s\, which collect the ionization component. This hybrid detection method i s extremely powerful for background reduction. The EDELWEISS devices are o perated in a low-radioactivity heavily-shielded dilution refrigerator inst alled in the deepest European underground laboratory in Modane (France). R ecently\, results have been achieved also with an extremely low-noise set up installed above ground.\nThe versatile and highly performing technology adopted by EDELWEISS opens new possibilities to detect signals induced by either electrons or nuclear recoils. EDELWEISS has developed a rich progr am to look for DM candidates with masses below 1 GeV and down to the MeV r ange (EDELWEISS SubGeV program)\, in a region of the parameter space where low-temperature detectors are extremely competitive. There is an increasi ng interest in this mass range motivated by the lack of evidence of new ph ysics at LHC (e.g. SUSY)\, which pushes to look beyond the standard WIMP d ark matter scenario\nDetectors are operated in two modes\, according to th e voltage magnitude applied to the ionization electrodes. In the low-volta ge mode\, discrimination between nuclear and electron recoils is maintaine d\, with threshold down to 50 eV (electron equivalent) in prospects. In th e high-voltage mode\, detection of single electron-hole pair in massive de tectors is possible.\nWe will report both on the promising technological a dvancements in these detection regimes and on recent results about low-mas s candidates. In particular\, we will present results on Axion-Like Partic les in the keV range and will report the attainment of the first sub-GeV s pin-independent dark matter limit based on a germanium target. The search has been extended to Strongly Interacting Particles (SIMP) down to masses of 45 MeV by exploiting the Migdal effect. Results on SIMPs with spin-depe ndent interactions will also be presented.\n\nhttps://indico.tlabs.ac.za/e vent/85/contributions/1478/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1478/ END:VEVENT BEGIN:VEVENT SUMMARY:Detection of supernova neutrino signal with NOvA detectors DTSTART;VALUE=DATE-TIME:20200227T121000Z DTEND;VALUE=DATE-TIME:20200227T123000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1472@indico.tlabs.ac.za DESCRIPTION:Speakers: Andrey Sheshukov (Joint Institute for Nuclear Resear ch)\nThe NOvA experiment has two segmented liquid scintillation detectors\ ,\nwhich are sensitive to the neutrino signal from a core-collapse\nsupern ova in our galaxy. Each of these detectors performs an online\nreconstruc tion and analysis of the neutrino interaction candidates\,\ncomparing thei r time distribution to that of the signals expected from a\ncore-collapse supernova. The statistical significance calculated in\nthis comparison is used to decide if a detector is currently observing a\nsupernova signal.\ n\nThe combination of these significance values from both detectors\nprovi des a more efficient metric for detecting the supernova signal\,\nincreasi ng the maximum distance at which NOvA can detect a core-collapse\nsupernov a.\n\nNOvA's approach for its combination of two detectors for supernova\n detection can be generalized to a network of various detectors with\ndiffe rent background levels and sensitivities.\n\nhttps://indico.tlabs.ac.za/ev ent/85/contributions/1472/ LOCATION:Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1472/ END:VEVENT BEGIN:VEVENT SUMMARY:EARTH\, a meeting of neutrino- and nuclear- physics. DTSTART;VALUE=DATE-TIME:20200225T130000Z DTEND;VALUE=DATE-TIME:20200225T132000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1479@indico.tlabs.ac.za DESCRIPTION:Speakers: Frederick Smit (NRF iThemba LABS\, Somerset West\, S outh Africa)\nOver the past 15 years\, in the consortium EARTH (Earth Anti neutRino TomograpHy)\, low energy experiments have been carried out with t he detection of antineutrinos as a theme. The ultimate goal was to learn m ore about the role of nuclear decay in the interior of the Earth [1-3]. Th is required developing direction sensitive antineutrino detection to detec t geoneutrinos. Here searching for remnants of possible nuclear reactions may also provide clues [4]. Other experiments were done into whether neutr inos from the Sun have a greater influence on radioactive decay than is co mmonly accepted by using antineutrinos from reactors as a surrogate to inv estigate these claims [5]. The work done on these unfinished projects will be reviewed and some ideas for future work will be given. \n\n[1] R.J. de Meijer et al.\, Earth\, Moon and Planets 99 (2006) 193\n[2] F.D. Smit et al.\, PoS (FNDA2006) 096\n[3] F.D. Brooks et al.\, AIP Conference Proceedi ngs 1412\, 177 (2011)\n[4] R.J. de Meijer et al.\, Radiation Physics and C hemistry 71 (2004) 769\n[5] R.J. de Meijer et al.\, Applied Radiation and Isotopes 69 (2011) 320\n\nhttps://indico.tlabs.ac.za/event/85/contribution s/1479/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1479/ END:VEVENT BEGIN:VEVENT SUMMARY:BBN\, Underground Nuclear Astrophysics and Neutrinos DTSTART;VALUE=DATE-TIME:20200225T122000Z DTEND;VALUE=DATE-TIME:20200225T124000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1465@indico.tlabs.ac.za DESCRIPTION:Speakers: Carlo Gustavino (INFN-Roma)\nNuclear astrophysics pl ays an important role in understanding open issues of neutrino physics. As an example\, the two key reactions of the solar p-p chain $^3He(^3He\,2p) ^4He$ and $^3He(^4He\,\\gamma)^7Be$ were studied at low energy with LUNA ( Laboratory for Underground Nuclear Astrophysics)\, providing an accurate e xperimental footing for the Standard Solar Model and consequently to study the neutrino mixing parameters. \nThe LUNA collaboration has now complete d the measurement of the $D(p\,\\gamma)^3He$ cross section with unpreceden ted precision at Big Bang Nucleosynthesis (BBN) energies. The accurate stu dy of this deuterium-burning process provides a precise determination of t he universal baryon density $\\Omega_b$\, in agreement with the value deri ved from CMB data and with comparable accuracy. \nFinally\, our analysis s everely constrains the possible existence of "dark radiation"\, i.e. the e xistence of relativistic particles not foreseen in the standard model\, su ch as sterile neutrinos or hot axions [1]. The LUNA result and consequence s in cosmology and particle physics are discussed in this contribution.\n\ n[1] E. Di Valentino\, C. Gustavino et al.\, Phys. Rev. D 90\, 023543 (201 4).\n\nhttps://indico.tlabs.ac.za/event/85/contributions/1465/ LOCATION:Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1465/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrino-induced reactions on $^{13}$C and $^{16}$O at supernova n eutrino energies DTSTART;VALUE=DATE-TIME:20200228T074000Z DTEND;VALUE=DATE-TIME:20200228T080000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1445@indico.tlabs.ac.za DESCRIPTION:Speakers: Toshio Suzuki (Nihon University)\nNeutrino-nucleus r eactions on $^{13}$C and $^{16}$O at supernova (SN) energies are investiga ted by shell-model calculations with the use of new Hamiltonian\, which ca n describe spin responses of nuclei quite well. Cabon-based scintillators and water-Cerenkov scintillators relevent to SN observation and experiment s at the spallation neutron sources are now available. Cross sections for various particle and $\\gamma$ emission channels are evaluated by the stat istical Hauser-Feshbach method.\n For $^{13}$C\, total reaction cross se ctions at reactor and solar neutrino energies were studied [1]. Here\, we extend our study to SN neutrino energies up to $\\approx$50 MeV\, and eval uations of partial cross sections for proton and neutron emission channels within the Standard Model [2]. Among them\, a reaction channel $^{13}$C ( $\\bar{\\nu}$\, $\\bar{\\nu}$'n) $^{12}$C (2$^{+}$\, 4.44 MeV) followed by prompt 4.44 MeV $\\gamma$ emission is discussed in relation to the shape distortion in the 5-7 MeV range in the measured neutrino spectrum in the s hort-baseline reactor neutrino experiments [3]. The cross section is too s mall to explain the extra enhancement in the spectrum. \n Coherent elast ic scattering cross section is obtained for ${13}$C\, and compared with th at for $^{12}$C. Nuclear structure effects in the cross sections are point ed out [2]. Possible merit of large recoil momenta in light nuclei for the study of neutron distributions in nuclei is discussed. \n For $^{16}$O\ , spin-dipole strength\, which are the dominant contributions to the cross sections\, and neutrino-induced reaction cross sections on $^{16}$O are i nvestigated [4]. Charged-current cross sections induced by SN neutrinos an d their dependence on Mikheyev-Smirnov-Wolfenstein neutrino oscillations a re discussed for a future SN burst [5]. \n\n[1] T. Suzuki\, A. B. Balante kin and T. Kajino\, Phys. Rev. C 86\, 015502 (2012).\n[2] T. Suzuki\, A. B . Balantekin\, T. Kajino and S. Chiba\, J. Phys. G 46\, 075103 (2019).\n[3 ] J. M. Berryman\, V. Brdar and P. Huber\, Phys. Rev. D 99\, 055045 (2019) .\n[4] T. Suzuki\, S. Chiba\, T. Yoshida\, K. Takahashi and H. Umeda\, Phy s. Rev. C 98\, 034613 (2018).\n[5] K. Nakazato\, T. Suzuki and M. Sakuda\, PTEP 2018\, 123E02 (2018).\n\nhttps://indico.tlabs.ac.za/event/85/contrib utions/1445/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1445/ END:VEVENT BEGIN:VEVENT SUMMARY:- DTSTART;VALUE=DATE-TIME:20200228T080000Z DTEND;VALUE=DATE-TIME:20200228T082000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1550@indico.tlabs.ac.za DESCRIPTION:https://indico.tlabs.ac.za/event/85/contributions/1550/ LOCATION:Main Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1550/ END:VEVENT BEGIN:VEVENT SUMMARY:Limits on the spectral parameters of core-collapse neutrinos extra cted from the Diffuse Supernovae Neutrino Flux (DSNvF). DTSTART;VALUE=DATE-TIME:20200227T113000Z DTEND;VALUE=DATE-TIME:20200227T115000Z DTSTAMP;VALUE=DATE-TIME:20260516T112026Z UID:indico-contribution-288-1483@indico.tlabs.ac.za DESCRIPTION:Speakers: Ernesto Kemp (University of Campinas - UNICAMP)\nIn February 1987 neutrinos from the SN1987 traveled a distance of about 50 kp c from the Large Magellanic Cloud and were detected on Earth by two of the largest neutrino telescopes of that time\, Kamiokande-II and IMB\, thus c onfirming the vast amount of energy (~10^53 ergs) predicted to be emitted in neutrinos and setting allowed intervals for the emission parameters lik e the neutrinosphere temperature. The confirmation of the main features of neutrino emission for a single supernova also supports the prediction tha t all the past supernovae in the universe should originate a ubiquitous an d isotropic neutrino flux\, the so-called Diffuse Supernova Neutrino Flux (DSNvF). Up to now\, no evidence of events from DSNvF was found by differ ent neutrino telescopes. In this work\, we use the upper limit on the DSNv F obtained from the null results of the Super-Kamiokande collaboration to estimate limits on average energy\, spectral pinching\, and neutrinosphere temperature for electron antineutrinos from a core-collapse neutrino burs t. Finally\, we check our results with those obtained from the solely SN19 87a data concluding that the DSNvF may lead to comparable - or even better - upper limits on the neutrino emission parameters.\n\nhttps://indico.tla bs.ac.za/event/85/contributions/1483/ LOCATION:Parallel Venue URL:https://indico.tlabs.ac.za/event/85/contributions/1483/ END:VEVENT END:VCALENDAR