KRUGER2012 International Workshop on Discovery Physics at the LHC

2 Dec 2012, 19:00 → 7 Dec 2012, 20:30 Africa/Johannesburg

Protea Kruger Gate Hotel

Kruger2012: The International Workshop on Discovery Physics at the LHC will take place from 3-7 December 2012 at the Protea Kruger Gate Hotel. Participants should book directly with the Hotel. The Workshop will consist of five days of plenary talks and parallel sessions where some of the very latest experimental results from the LHC (ALICE, ATLAS, CMS and LHCb), as well as topical beyond the Standard Model theories, will be presented. The surroundings of one of the worlds largest national parks, and the physics results presented during this workshop, will serve to inspire discussions between theorists and experimentalists on the latest LHC and Tevatron measurements as well as our expectations for the future. Early Bird registration fees of R 3 500.00 are payable before 31 August 2012. From 1 September 2012 the fees will be R 4 000.00. Invoices will be sent upon registration and payments are to be made to iThemba LABS. Banking details are attached. All fees exclude bank charges. Bank charges are payable by the delegate.

Group Photo Group_Photo.JPG

Programme KRUGER_2012_Final_12_Dec.pdf

Sunday, 2 December

19:00 → 21:00 Welcome Function on the banks of the Sabie River with Shangaan dancers and choir

Monday, 3 December

09:45 → 10:00 Welcome

Speaker: Dr Zeblon Vilakazi (iThemba LABS)

10:00 → 10:45 Lessons from LHC8

Speaker: Dr Gian Francesco Giudice (CERN)

Talk giudice.pdf

10:45 → 11:30 LHC Status

Speaker: Dr Mike Lamont (CERN)

Slides kruger-LHC-status.pptx

11:30 → 12:00 Morning Tea

12:00 → 12:45 SM Higgs searches with the ATLAS experiment at the LHC

The latest results of the Standard Model Higgs boson search with the ATLAS experiment, in pp collisions data collected in 2011 and 2012 are presented. Individual search channels, as well as their combination are detailed. The significance of the observed excess of the Higgs-like resonance are updated and presented. Preliminary results from the measurement of the properties of the Higgs-like particle are presented.

Speaker: Dr Rachid Mazini (Institute of Physics, Academia Sinica Taiwan)

12:45 → 13:30 Search for the Standard Model Higgs at the LHC

Results about the experimental searches for the Standard Model Higgs in the decays to fermions and gauge bosons at a collision energy of 7 and 8 TeV at the LHC are presented. The analysis uses pp collision data recorded by the CMS detector at the LHC, corresponding to integrated luminosities of 5.05 fb-1 at collision energy of 7 TeV and 5.26 fb-1 at 8 TeV. The searches cover overall Higgs boson mass hypotheses in the range 110 < m_H < 600 GeV. A complete description of the analyses for the H->gg and H->ZZ-> 4lepton searches, the most clean and high resolution channels, is provided. The nature of the excess of events observed in those two channels is explained. The general strategy and the final results are shown for the searches of the Higgs boson in the H->WW, H->tautau and H->bb channels. The results for 7 and 8 TeV analyses are combined to derive the best sensitivity of the Higgs searches by the CMS detector at the LHC and the most complete results with 2011 and 2012 data.

Speaker: Prof. Mayda Velasco (Northwestern University)

Talk Kruger_2012_velasco.pdf

13:30 → 14:30 Lunch

14:30 → 17:00 Parallel Session I: BSM, Exotics

14:30 Probing extra-dimensions at the LHC using quartic photon W and photon Z anomalous couplings

We present a new method to test the Standard Model expectations at the LHC using photon-induced WW and ZZ productions. Both W decay in the main ATLAS or CMS detectors while scattered protons are measured in forward detectors. The sensitivity to anomalous WW gamma gamma and ZZ gamma gamma quartic couplings can be improved respectively by four orders of magnitude compared to the present LEP limits, allowing to probe with an unprecendented precision higgsless or extra dimension models. Details will be given how to achieve these results using an upgrade of the ATLAS or CMS experiment.

Speaker: Mr Christophe Royon (IRFU-SPP, CEA Saclay)

Talk Royon_krueger.pdf

15:00 Searches for a light Higgs and dark photons at BABAR

Babar collided electrons and positrons at a centre of mass energy of ~10GeV at the Stanford Linear Accelerator Center. A light CP-odd Higgs boson is expected in extensions to the Standard Model such as Next to Minimal Supersymmetry. The Babar Collaboration searched for a light Higgs boson (A0) produced in radiative decays of an Υ meson (Υ → γA0). We saw no evidence of the A0 decaying into mu+mu-, tau+tau-, hadrons, or invisible final states with a sample of 122 million Υ(3S), 99 million Υ(2S), and 23 million Υ(1S) from Υ(2,3S) decays collected at the PEP II B-factory. We set upper limits on product branching fractions B(Υ→γA0)xB(A0→various states) as low as 10^-6 for A0 masses from threshold up to 9GeV/c^2. As a result, we exclude a large fraction of parameters space for Next to Minimal Supersymmetry. We also search for a dark Higgs boson motivated by astrophysical experiments using 516/fb of data collected with the BABAR detector. We could not find evidence of such a dark Higgs so we set upper limits on its branching fraction.

Speaker: Mr Rocky So (University of British Columbia)

Talk rockyKruger2012.pdf

15:30 Afternoon Tea

16:00 Search for the neutral sypersymmetric Higgs boson at CMS

Speaker: Mr Antonio Branca (University of Padova / INFN / CERN)

16:30 Searches for neutral and charged Higgs bosons in the ATLAS experiment as a test of physics beyond the Standard Model

In several theories beyond the Standard Model, the Higgs sector consists of more than one complex scalar doublet. For instance, supersymmetric models such as MSSM have 5 physical Higgs states, two charged and three neutral. In this presentation, a review of the searches for new neutral and charged Higgs bosons in ATLAS at the Large Hadron Collider is presented.

Speaker: Dr Arnaud Ferrari (Uppsala University)

14:30 → 17:00 Parallel Session II: Heavy Ion Collisions

14:30 Light-flavour identified charged-hadron production in pp and Pb--Pb collisions at the LHC

Thanks to the unique detector design adopted to fulfil tracking and particle-identification (PID) requirements (e.g. low momentum cut-off and low material budget), the ALICE experiment provides significant information about hadron production both in pp and Pb--Pb collisions. In particular, the spectral shapes and production yields of identified particles play a key role in the study of the collective and thermal properties of the matter formed in high-energy heavy-ion collisions. Furthermore, the production of high-p_T particles provides insights into the density of the medium and the in-medium energy-loss mechanisms. Transverse momentum spectra of &pi^±, K^±, p and ¯p are measured at mid-rapidity (|y| < 0.5) over a wide momentum range, from ~100 MeV/c up to ~20 GeV/c. The measurements are performed exploiting the dE/dx in silicon (ITS) and gas (TPC), the time-of-flight (TOF) and the ring-imaging Cherenkov (HMPID) particle-identification techniques, which will be briefly reviewed in this report. The current results on light-flavour charged-hadron production will be presented for pp collisions at √s = 0.9, 2.76 and 7 TeV and for Pb--Pb collisions at √s_NN = 2.76 TeV. Production yields, spectral shapes and particle ratios in pp are discussed as a function of the collision energy and compared to previous experiments and commonly-used Monte Carlo models. Pb--Pb collisions at the LHC feature the highest radial flow ever observed and an unexpectedly low p/&pi production ratio. The results are presented as a function of collision centrality and compared to RHIC data in Au--Au collisions at √s_NN = 200 GeV and predictions from thermal and hydrodynamic models. The nuclear modification factor (R_AA of identified hadrons will also be discussed and compared to unidentified charged particles and theoretical predictions. This is observed to be identical for all particle species at high-p_T.

Speaker: Dr Roberto Preghenella (Museo Storico della Fisica e Centro di Studi e Ricerche "Enrico Fermi" and INFN Sezione di Bologna)

15:00 (Anti-)matter and hyper-matter production at the LHC with ALICE

ALICE is the experiment at the CERN LHC dedicated to the investigation of nucleus--nucleus collisions at the highest energies ever reached in the laboratory. The excellent particle identification capabilities of ALICE allow for the reconstruction of a significant number of rare states or even exotic ones. In this talk we present results from a sample of Pb--Pb collisions at a center of mass energy of √s_NN = 2.76 TeV per nucleon--nucleon pair. Light nuclei up to ³He and ⁴He as well as the corresponding anti-nuclei have been identified based on their specific energy loss in the Time Projection Chamber and velocity information from the Time-Of-Flight detector. (Anti-)hyper-tritons have been reconstructed via their mesonic decay (³&Lambda H → ³He + &pi) exploiting their secondary vertex decay topology. The (³He, &pi) invariant mass spectrum will be presented. In addition, searches for even lighter hyper-matter states, i.e. &Lambda -&Lambda (also known as H-Dibaryon) and &Lambda-n bound states, will be discussed. The results will be compared with model expectations.

Speaker: Ms Nicole Alice Martin (Research Division and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany)

Talk kruger_nicole_martin.pdf

15:30 Afternoon Tea

16:00 Flow with ALICE

The expansion of the spatially asymmetric dense and hot medium created in heavy-ion collisions causes, through multiple constituent interactions, correlations between the produced particles. Anisotropic flow, apparent in the azimuthal correlations with respect to the collision symmetry planes is a unique observable associated with the thermodynamic properties and the evolution of the created medium. Elliptic flow, together with the higher order flow coefficients and mixed harmonic correlations, can provide insights into the effects of the event-by-event fluctuations of the initial shape of the produced system. In this talk a range of azimuthal correlation measurements in Pb-Pb collisions at \sqrt{s}=2.76 TeV per nucleon pair measured with the ALICE detector at the LHC will be presented as a function of transverse momentum and collision centrality over a wide (pseudo-) rapidity range for various species of identified hadrons. The results will be compared to hydrodynamic model calculations and to measurements at lower energies.

Speaker: Dr Mikolaj Krzewicki (GSI)

Talk m.krzewicki.kruger.2012.pdf

16:30 Measurement of coherent J/Psi production in Ultra-Peripheral Collisions with the ALICE detector at the LHC

Ultra-relativistic heavy ions generate strong electromagnetic fields which offer the possibility to study gamma--gamma and gamma-nucleus processes at the LHC in the so called ultra-peripheral collisions (UPC). The coherent photoproduction of J/Psi vector mesons in UPC is sensitive to the gluon distribution of the interacting nuclei. Here we report on ALICE results of J/Psi coherent production measured in PbPb collisions at sqrt(s_NN) = 2.76 TeV where the J/Psi has been measured in the mu mu decay channel with the Alice Muon Spectrometer in the rapidity range -3.6

Speaker: Dr Guillermo Contreras (CVUT Praga)

Talk jgc_kruger12.pdf

14:30 → 17:00 Parallel Session III: Theory

14:30 Tomography of the QGP by open charm and bottom mesons

Study of the radiative and collisional energy loss of heavy quarks in a QGP and the following hadronisation. Analysis of the recent RHIC and LHC B and D meson data.

Speaker: Dr Joerg Aichelin (SUBATECH)

15:00 The QGP dynamics in relativistic heavy-ion collisions

The dynamics of partons and hadrons in relativistic nucleus-nucleus collisions is analyzed within the novel Parton-Hadron-String Dynamics (PHSD) transport approach, which is based on a dynamical quasiparticle model for partonic phase (DQPM) including a dynamical hadronization scheme. The PHSD model reproduces a large variety of observables from SPS to LHC energies, e.g. as quark-number scaling of elliptic flow, transverse mass and rapidity spectra of charged hadrons, dilepton spectra, open and hidden charm production, collective flow coefficients etc., which are associated with the observation of a sQGP. The 'highlights' of the latest results will be presented and open questions/perspectives will be discussed.

Speaker: Dr Elena Bratkovskaya (ITP, FIAS, Uni. Frankfurt)

Talk Bratkovskaya_Kruger_12.pdf

15:30 Afternoon Tea

16:00 An effective model description of QCD thermodynamics

An effective model reproducing:the equation of state of hadronic matter as obtained in lattice QCD simulations basic is constructed. The model is based on the Mott-Hagedorn resonance gas approach and extended PNJL model. All basic physical characteristics of processes encountered in the dense hadronic matter are taken into account.

Speaker: Prof. Ludwik Turko (Institute of Theoretical Physics, University Wroclaw)

Talk Kruger_2012_Turko.pdf

16:30 Is it Hard yet? The qualitative agreement of pQCD energy loss with RHIC and LHC data

High momentum particles provide the most direct probe of the pertinent physics of the quark-gluon plasma produced at RHIC and LHC. We present comparisons of the latest pQCD- and AdS/CFT-based energy loss models with the newest high momentum measurements from RHIC and LHC. In contrast to the naive success of strong coupling AdS/CFT methods in describing the very small viscosity to entropy ratio extracted from hydrodynamics studies, the qualitative agreement of the weak-coupling and the disagreement of the strong-coupling calculations compared to high momentum observables suggest that the dominant quark-gluon plasma physics is best described using perturbative QCD methods. Future measurements may hold the key to understanding this potential crossover between strong and weak coupling dynamics.

Speaker: Dr Will Horowitz (University of Cape Town)

Talk 121203(Kruger)Horowitz.pptx

17:00 → 17:45 The deconfinement of Charm and Beauty

Speaker: Prof. Helmut Satz (University of Bielefeld)

Talk satz-kruger.pdf

18:30 → 20:30 Dinner

Tuesday, 4 December

09:15 → 10:00 Statistics for Higgs search and discovery

The LHC statistical method is based on the Profile Likelihood test statistics and its asymptotic formalism. In this lecture the statistical methods (including the so called Look Elsehere Effect) and their implications on the Higgs search and discovery at the LHC will be reviewed.

Speaker: Prof. Eilam Gross (Weizmann Institute of Science)

10:00 → 10:45 Overview of results from the ALICE Experiment at the CERN LHC

ALICE, designed as a general purpose heavy-ion detector for the CERN Large Hadron Collider has been successfully running for the last three years. Data from pp collisions have been collected at different centre of mass energies, including 0.9, 2.76 and 7 TeV and from Pb-Pb collisions at 2.76 TeV per nucleon. The data analysis shows intriguing properties of the produced matter in Pb-Pb collisions. The results indicate that the created system is larger, hotter and denser compared to the one created in heavy-ion collisions at lower energies and it still behaves like a perfect, strongly interacting liquid. A review of recent ALICE results will be presented.

Speaker: Dr Yiota Foka (GSI/CERN)

Talk YF-KRUGER-asGiven_Foka.ppt

10:45 → 11:30 Testing the Standard Model with rare decays at the LHCb

Speaker: Dr Eugeni Grauges Pous (Universitat de Barcelona)

Talk grauges-LHCb-Kruger2012.pdf

11:30 → 12:00 Morning Tea

12:00 → 12:45 Review of results from the Tevatron

Speaker: Dr Sahal Yacoob (University of Kwazulu Natal)

Talk Tevatron_SY_Yacoob.pptx

12:45 → 13:30 Strangeness production in the ALICE detector

The ALICE experiment at the LHC has measured the production of strange hadrons in Pb--Pb and pp collisions at unprecedented beam energies. Particles are reconstructed via their weak decay topologies exploiting the excellent tracking and particle identification capabilities of the apparatus. Transverse momentum spectra and yields at mid-rapidity have been studied for &Lambda, &Xi^- and &Omega^- baryons and their anti-particles as well as for kaons. Results in Pb--Pb collisions at √s_NN = 2.76 TeV for different centrality intervals will be presented and compared with pp and lower energy nucleus-nucleus measurements.

Speaker: Dr Domenico Elia (INFN Bari)

Talk elia_KRUGER2012.pdf

13:30 → 14:30 Lunch

14:30 → 17:00 Parallel Session IV: BSM, SUSY, Exotics

14:30 Searches for Physics beyond the SM in Monojets and Monophotons events with the ATLAS detector

There are various models for physics beyond the standard model that predict event signatures with large missing transverse energy due to invisible new particles. Such events can be identified in the detector if they are accompanied by an energetic photon or a jet with high transverse energy. The main contributions to the standard model background are production of Z and W bosons together with a jet or a photon, where the Z decays into 2 neutrinos or where the decay lepton from the W is not identified. This talk presents results from searches for new physics with both signatures with the ATLAS detector at the LHC. The focus will be on the analyses using the full 2011 data set at a center of mass energy of sqrt(s)=7TeV but also include updates with data recorded in 2012 at sqrt(s)=8TeV. The results are translated into exclusion limits on parameters of different theoretical models.

Speaker: Ms Ruth Pöttgen (CERN)

Talk Kruger2012_MonoX_Poettgen.pdf

15:00 Search for single and pair production of dijet resonances with the CMS Detector

We report on a search for single and pair-produced particles in leading two-jet and four-jet final states at CMS, using pp collision data at sqrt{s} = 7 TeV and 8 TeV provided by the Large Hadron Collider. In the standard model, dijet masses based on leading jets in the central region of CMS should be smoothly distributed. We use this spectrum to search for narrow resonances and set lower limits on the masses of string resonances, excited quarks, axigluons, colorons, S8 resonances, E6 diquarks, W' and Z' bosons, and RS gravitons. In four-jet final states, we require closely matched pairs of dijets to search for pair-production of new colored particles decaying to dijets. This channel is also sensitive to pair-produced RPV stop decays.

Speaker: Dr Kai Yi (University of Iowa)

15:30 Afternoon Tea

16:00 Search for exotic resonances in diboson final states with the CMS detector at the LHC

We present the results of searches for new resonances decaying to dibosons (WW, WZ, ZZ) using data collected by the CMS experment at the LHC. The results are interpreted in benchmari models, such as the Randall-Sundrum gravitons, the Sequential Standard Model W', and Technicolor.

Speaker: Ms Flavia de Almeida Dias (Sao Paulo State University)

Talk F_Dias_Kruger.pdf

16:30 Search for Exotics heavy resonances with the ATLAS detector

Resonances decaying into a pair of particles are an obvious place to look for phenomena beyond the Standard Model. This talk summarizes wide collection of recent results on searches for resonances decaying to pairs of jets including top antitop, leptons including taus and dibosons. Variety of Beyond the Standard Model are considered, among them GUT models, the Randall-Sundrum gravitons a well as the ADD large extra dimension scenario and Technicolor.

Speaker: Mr Simon Viel (University of British Colombia)

Talk ATLAS-KRUGER12-SViel.pdf

14:30 → 17:00 Parallel Session V: Quarkonia

14:30 Quarkonium Production at STAR

The production of quarkonium has been studied to provide information about the Quark Gluon Plasma (QGP) that is expected to be created in relativistic heavy ion collisions at RHIC. Lattice QCD predicts a suppression of quarkonium production in a hot and dense nuclear medium, due to the Debye screening of the potential between heavy quarks, relative to proton-proton collisions. The suppression pattern of the various quarkonium states may provide insight into the thermodynamic properties of the QGP. However, there are other effects which may contribute to the modification of heavy quarkonium production, such as formation-time effects, statistical coalescence of heavy quark-antiquark pairs, the modification of nuclear PDFs (shadowing), and nuclear absorption, which need to be taken into account in order to fully quantify a suppression in heavy ion collisions. This can be achieved by studying the production of various quarkonium states in p+p, d+A, and A+A collisions. In this talk we will report the results on heavy quarkonium production in p+p, d+Au, and Au+Au collisions at midrapidity via the dielectron decay channel at sqrt(s_NN) = 200 GeV from STAR. Results from J/psi production in p+p collisions will be presented to provide a baseline for production and understand the quarkonium production mechanism. The nuclear modification factor for J/psi in d+Au and Au+Au will also be reported, along with results from Upsilon production in p+p, d+Au, and Au+Au collisions.

Speaker: Mr Christopher Powell (Lawrence Berkeley National Laboratory / University of Cape Town)

Talk kruger2012_cbpowell.pdf

15:00 J/Psi Production in the ALICE detector

Speaker: Dr Guillermo Contreras (CVUT Praga)

15:30 Afternoon Tea

16:00 Production of beauty and quarkonia in ATLAS: transverse momenta spectra, prompt and non-prompt production, spectroscopy

Measurements of quarkonia and open heavy-flavor states at the LHC can often probe the available predictions. ATLAS has measured the production cross section of prompt and non-prompt J/Psi as well as Y(1,2,3 S), together with the inclusive production of b-flavored hadrons. The kinematical ranges covered by these analyses probes higher transverse momenta than previous studies. The results are in some cases marginally compatible with the latest available predictions. Excited B-hadrons and quarkonia states have also been detected with the ATLAS detector, further expanding the investigation in the field of b-hadron and onia spectroscopy. The latest results, which include the observation of new particles, will be illustrated together with the perspectives for future analyses.

Speaker: Mr Tomas Jacoubek (Institute of Physics Academy of Sciences of the Czech Republic)

16:30 Latest results on the search for the D0->µµ and Bs(Bd)->µµ decays from CMS

One promising way to search for physics beyond the Standard Model is to look at decay modes that are extremely rare or forbidden, such as the decays of neutral charm and bottom quarks into opposite charge muon pairs. New Physics models can enhance the Standard Model predicted BR by several order of magnitudes. We will report the latest results of the search for D0->µµ and Bs(Bd)->µµ using the data collected in 2011 and 2012 by the CMS detector at LHC.

Speaker: Dr Fabrizio Palla (INFN, Pisa)

Slides Kruger.pdf

14:30 → 17:00 Parallel Session VI: Standard Model Higgs

14:30 Search for Higgs Decaying to WW at CMS

A search for a standard model Higgs boson decaying into a WW pair is presented, using CMS proton-proton collision data both at 7 TeV and 8 TeV centre-of-mass energy. Both fully-leptonic and semileptonic W decay final states are considered. The combination of these two decay modes is sensitive to the existence of the SM Higgs in the mass range [120, 600] GeV/c^2.

Speaker: Mr Leonardo di Matteo (University and INFN Milano-Bicocca)

Talk CMS_HWW_Kruger2012_di_Matteo.pdf

15:00 Search for the Standard Model Higgs boson produced decaying to a b-quark pair and Tau-lepton pair with the ATLAS detector

The results of the ATLAS search for the Standard Model Higgs boson decaying to a b-quark pair and Tau-lepton pair are presented, based on the proton-proton collision data recorded in 2011 and 2012. Upper limits on the cross-section times branching ratio are derived.

Speaker: Dr Ada Farilla (INFN Roma Tre)

Talk Farilla_Kruger2012_V4.pdf

15:30 Afternoon Tea

16:00 Search for the Standard Model Higgs boson in the H -> GammaGamma, H->WW and H->ZZ decay modes with the ATLAS detector

A Higgs boson search in the H->GammaGamma, H -> WW ->lvlv and H->ZZ->4l decay modes has been performed using proton-proton collisions collected in 2011 and 2012 with the ATLAS detector. Updated results on the observed resonance including first measurement of its properties are presented.

Speaker: Dr German David Carrillo Montoya (University of the Witwatersrand)

Slides ATL-COM-PHYS-2012-1720.pdf

16:30 Property measurements of the Higgs-like Boson from CMS

Earlier this year a new boson with a mass of around 125 GeV was discovered at the LHC. Though it is compatible with the long sought-after Higgs boson only precise measurements of its properties will confirm this. The latest results from CMS on measurements of the properties of the new boson, derived from a study of all production and decay channels measured so far, will presented together with prospects for the future.

Speaker: Dr Jonathan Hays (Queen Mary University London)

Talk HiggsProperties_hays.pdf

17:00 → 17:45 Beam Energy Scan (BES) at STAR

Speaker: Dr Grazyna Odyniec (Lawrence Berkeley National Laboratory)

Talk Kruger_2012_final_Dec3_Odyniec.pdf

18:30 → 20:30 Dinner

20:30 → 21:00 The African School of Fundamental Physics and its Applications

We have established a biennial school of physics in Africa, on fundamental subatomic physics and its applications. The aim of the school is to build capacity to harvest, interpret, and exploit the results of current and future physics experiments with particle accelerators, and to increase proficiency in related applications, such as medicine, and technologies. The school is based on a close interplay between theoretical, experimental, and applied physics. The first school took place in Stellenbosch, South Africa on 1−21 August 2010. We proposed the second edition of the biennial school in Ghana on 15 July – 8 August 2012. In this talk, we will presented the activities of both school in 2010 and 2012.

Speaker: Dr Ketevi Assamagan (BNL)

Wednesday, 5 December

10:00 → 10:45 The charm of hot matter - charmonium and open charm measurements in Pb-Pb collisions with ALICE at the LHC

Among the various suggested probes of deconfinement, charmonium states play a distinctive role. J/psi is the first hadron for which a clear mechanism of suppression (melting) in deconfined matter was proposed early on, based on the color analogue of Debye screening. The ALICE measurements of J/psi production in Pb-Pb collisions are performed as a function of collision centrality, transverse momentum and rapidity. The nuclear modification factor of J/psi production shows that, at the LHC, there is an enhanced relative production at low transverse momentum compared to that at lower energies. Corroborated with the measurements of open charm hadrons, which will also be discussed, the charmonium results hint at a production in a thermalized hot medium. Comparisons to model predictions indicate that J/psi production occurs in deconfined matter or at hadronization.

Speaker: Dr Anton Andronic (GSI Darmstadt)

Talk Q_Kruger12_Andronic.pdf

10:45 → 11:30 Heavy Ion Physics with ATLAS

Speaker: Dr Zvi Citron (Weizmann Institute of Science)

Talk zcitron_HIATLAS_kruger2012.pptx zcitron_HIATLAS_kruger2012.pptx

11:30 → 12:00 Morning Tea

12:00 → 12:45 Search for Physics beyond the Standard Model with the ATLAS detector

Speaker: Dr Andree Robichaud-Veronneau (University of Oxford)

Talk Kruger_SUSY_exo_2012_Robichaud.pdf

12:45 → 13:30 New Results from CMS

Speaker: Prof. Christopher Hill (The Ohio State University)

Talk HiggsProperties_hays.pdf

13:30 → 14:30 Lunch

14:30 → 17:00 Parallel Session IX and Student Session

14:30 ATLAS measurements of vector boson and diboson production

Vector boson production in pp collisions at 7 TeV has been extensively studied by ATLAS. Recent results include the measurement of Drell-Yan differential production cross section and of jets and heavy flavours production in association with vector bosons. ATLAS measurements of diboson production processes involving all combinations of W and Z are also summarized. Differential and total visible cross sections are presented and are used to place constraints on anomalous triple-gauge boson couplings.

Speaker: Mr William Buttinger (University of Cambridge)

15:00 Electroweak results from CMS

The latest electroweak results from CMS, based on pp collision data taken at 7 and 8 TeV, are presented. In particular precise measurements of the inclusive and differential cross sections for W Z boson production, and for multi-bosons production will be shown.

Speaker: Dr Vitaliano Ciulli (Università di Firenze and INFN, Firenze)

Talk vciulli_EWK_kruger.pdf

15:30 Afternoon Tea

16:00 First direct observation of time reversal violation in the B system and new CPV results from BABAR

While CP violation in the B-meson system has been well established by the B factories, there has been no direct observation of time-reversal violation in this system. Furthermore, previous T-violation measurements in other systems are typically not able to distinguish between T and CP violation. Using 468 million B-Bbar pairs collected by the BABAR detector at SLAC, we directly measure T-violating parameters in the time evolution of neutral-B mesons by comparing the probabilities of B0 or anti-B0 transforming into definite CP final states and vice versa. The results lead to the first direct, high-significance observation of Time Reversal non-invariance, independent of CP violation. We also present new and precise measurements of the CKM angle alpha and the CP-violation parameter |q/p|.

Speaker: Prof. Franco Simonetto (Universita & INFN Padova)

Talk Simonetto.pdf

16:30 Evolution of Yukawa Coupling and Quark Flavor Mixings in the 5D MSSM

Speaker: Mr Ammar Abdalgabar (University of Wits)

Talk Ammar's_presentation.pdf

16:40 Z' boson decay to di-muon final states

Speaker: Ms Catherine Hsu (University of the Witwatersrand)

Talk Catherine.pdf

16:50 Baryon-Omega Meson Electroproduction

Speaker: Mr Doomnull Attah Unwuchola (University of Johannesburg)

Talk DOOMNULL_KRUGER2012_Dec05.pdf

14:30 → 17:00 Parallel Session VII: BSM, SUSY, Exotics

14:30 Studies of exotic quarkonium states at CMS

Using large data samples of di-muon events, CMS has performed detailed measurements in the field of exotic quarkonium production. We will present very recent result on the X(3872) exotic state, in the J/psi pi pi decay channel, based on ~6500 events, collected at sqrt(s) = 7 TeV, and covering unprecedentedly high values of pT. The cross-section ratio w.r.t. the psi(2S) will be given differentially in pT, as well as pT integrated. For the first time at the LHC the fraction of X(3872) coming from B hadron decays has been established. We finish with a measurement of the di-pion mass spectrum to establish details of the nature of the decay. Having opened the field for studies on exotic quarkonium, we will report detailed measurements from one more exotic state.

Speaker: Dr Alessandra Fanfani (University and INFN Bologna)

Talk CMSExoticQuarkKrugerv4_Fanfani.pdf

15:00 Inclusive searches for squarks and gluinos with the ATLAS detector

Despite the absence of experimental evidence, weak scale supersymmetry remains one of the best motivated and studied Standard Model extensions. This talk summarizes recent ATLAS results on inclusive searches for supersymmetric squarks and gluinos in events containing jets, missing transverse momentum with and without leptons of all generations and photons.

Speaker: Mr Valerio Consorti (Albert-Ludwigs-Universitaet Freiburg (DE))

15:30 Afternoon Tea

16:00 Search for the Standard Model Higgs at CMS in the 4 Lepton Channel

Speaker: Dr Nicola de Filippis (Politecnico and INFN Bari)

Talk DeFilippisKrutger12.pdf

16:30 Searches for natural supersymmetry with the ATLAS detector

Naturalness arguments for weak-scale supersymmetry favour supersymmetric partners of the third generation quarks, Higgs and electroweak gauge bosons with masses not too far from those of their Standard Model counterparts. Real and virtual production of third generation squarks via decay of a gluino can be significant if the mass of the gluino does not exceed the TeV scale. Top or bottom squarks as well as gauginos and sleptons with masses less than a few hundred GeV can also give rise to direct pair production rates at the LHC that can be observed in the data sample recorded by the ATLAS detector in 2011 and 2012. The talk presents recent ATLAS results from searches for gluino mediated and direct stop and sbottom pair production in various final states, and for electroweak production of gauginos and sleptons in final states with leptons.

Speaker: Dr Mark Hodgkinson (University of Sheffield)

Talk markhod_Kruger12_Final.pdf

14:30 → 17:00 Parallel Session VIII: Heavy Ion Collisions

14:30 Photoproduction of Rho-0 in Ultra-Peripheral Nuclear Collisions at ALICE

Photoproduction of ρ0 mesons in ultra-peripheral Pb+Pb collisions has been studied by the ALICE Collaboration at the CERN LHC. The strong photon flux associated with relativistic charged particles leads to a very large cross section for exclusive photoproduction of ρ0 meson in interactions of the type P b + P b → P b + P b + ρ0. For a ρ0 produced at mid-rapidity at the LHC, the photon-nucleus center of mass energy is roughly a factor of three higher than in any previous experiment. The ALICE detector is a general purpose detector dedicated to study heavy-ion collisions. ALICE has excellent performance in the low pT region, and can reconstruct charged particle tracks with 0.1 GeV/c ≤ pT ≤ 100 GeV/c. In this analysis some of the major components of the ALICE central barrel are used: The Inner Tracking System, with six layers of silicon detectors, is used for the first part of the tracking and for finding the collision vertex. Outside of the Inner Tracking System is the Time Projection Chamber, which is the main tracking device in ALICE. Trigger information is provided by the following detectors: The Time-Of-Flight (TOF), located outside the TPC; the VZERO detectors, plastic scintillators located outside of the central barrel, covering roughly two units of pseudorapidity on eiher side of mid-rapidity; and by the Silicon-Pixel Detector (SPD), a part of the Inner Tracking System. In the 2010 Pb-Pb run there were two different triggers for ultra-peripheral collisions in the ALICE central barrel. For the first part of the run a trigger which required a signal of at least two hits in the TOF was used. Later in the run the trigger also included a signal of at least two hits in the SPD and a veto on the VZERO detectors. The data for both triggers in the 2010 heavy-ion run has been analysed. Preliminary results on ρ0 production will be presented.

Speaker: Mr Kyrre Skjerdal (University of Bergen)

Talk kruger2012_kskjerdal_v5.pdf

15:00 Summary of ALICE at the LHC results from heavy flavour measurements in p-p and Pb-Pb collisions at LHC energies.

A Large Ion Collider Experiment (ALICE) is one of the 4 large experiments at the CERN Large Hadron Collider (LHC). The primary purpose of ALICE is to study and characterize the Quark Gluon Plasma (QGP) formed in high-energy nuclear collisions. The capabilities of ALICE include excellent particle identification, wide rapidity coverage, precise vertexing and tracking in a high multiplicity environment, making it possible to study heavy flavour (charm and beauty) production. Heavy flavours are produced at the early stage of the collision in hard partonic scattering. In proton-proton collisions they are used as bench-mark for perturbative QCD calculations while in heavy ion collisions they are used as probes of the transport properties of strongly-interacting matter at high energy density. In ALICE heavy flavours are studied at mid-rapidity via the hadronic and semi-electronic decay channels as well as at forward rapidity using the muon spectrometer. The ALICE collaboration has published results obtained from heavy flavour measurements in p-p at √s = 2.76 and 7 TeV and Pb-Pb collisions at √s(NN) = 2.76, respectively. In this presentation we will report on some of these results. In particular, we will discuss the observations of high-momentum suppression of azimuthal anisotropy of heavy-flavour hadrons.

Speaker: Dr Zinhle Buthelezi (iThemba LABS)

Talk Kruger2012-Presentation-5Dec-ZButhelezi.pdf

15:30 Afternoon Tea

16:00 The long-wavelength limit of the Boltzmann equation: recent insights in deriving dissipative relativistic fluid dynamics

In this talk (based on arXiv:1202.4551 [nucl-th]), I present a new derivation of dissipative relativistic fluid dynamics from the Boltzmann equation via the method of moments. In constrast to previous derivations, the single-particle distribution function is not subjected to a truncation in an uncontrolled way. Instead, it is expanded in terms of irreducible tensors in momentum-space and orthogonal polynomials in energy. The infinite system of moment equations, which is equivalent to the Boltzmann equation, can then be truncated in a controlled way by considering only the slowest microscopic time scale and a rigorous power-counting in Knudsen and inverse Reynolds numbers. I demonstrate that agreement with microscopic solutions of the Boltzmann equation for specific test problems can be improved by going beyond the traditional 14-moment approximation

Speaker: Prof. David Rischke (University of Frankfurt)

Talk Kruger_2012_Rischke.pdf

16:30 Hadronic Resonance Production in pp and pb-pb collisions at the LHC with the ALICE experiment

Speaker: Dr Helmut Oeschler (TU Darmstadt)

Talk Oeschler_Kruger_2012-1.ppt

17:00 → 17:45 Phase Structure of Strongly Interacting Matter

Speaker: Prof. Krzysztof Redlich (University of Wroclaw)

Thursday, 6 December

10:00 → 10:45 The NICA Project

Speaker: Prof. Alexander Sorin (JINR, Dubna)

Talk Sorin_Kruger_06_12_2012_a.pdf

10:45 → 11:30 Strangeness from GeV to TeV

Speaker: Dr Helmut Oeschler (TU Darmstadt and CERN)

Talk Oeschler_Kruger_2012-1.ppt

11:30 → 12:00 Morning Tea

12:00 → 12:45 CP violation at LHCb

Speaker: Dr Olaf Steinkamp (Physik-Institut der Universitaet Zuerich)

Talk 121206_Kruger_Steinkamp.pdf

12:45 → 13:30 Standard Model and Top Physics with ATLAS

The ATLAS collaboration has performed studies of a wide range of Standard Model physics processes in pp collisions. Recent measurements of soft particle to hard photon and jet production, which are sensitive to QCD phenomena, are presented. Drell-Yan, vector boson and diboson production cross sections are also discussed, together with constraints on anomalous triple-gauge boson couplings. Inclusive cross-section measurements for top-quark pair and single top t- and Wt-channels are shown. For top-quark pair production, emphasis is given to differential measurements and additional radiation studies, including also spin correlation and top-quark charge asymmetry. Intrinsic top quark properties as its mass and charge as well as a measurement of the polarization of W bosons in top quark decays are also presented.

Speaker: Mr Killian Rosbach (Université de Genève, DPNC)

Slides kruger2012_rosbach_ATLAS_SM_Top.pdf

13:30 → 14:30 Lunch

14:30 → 17:00 Parallel Session X

14:30 Does p-p soft scattering attain saturation at the TeV-scale?

The properties of p-p scattering amplitudes at the TeV-scale and above are studied, so as to check their asymptotic behavior and determine the rate at which they approach the bounds implied by s and t channel unitarity saturation. I shall examine the available cross sections at exceedingly high energies,as well as the corresponding behavior of the coupled models aiming to reproduce the values of this data. My conclusion is that p-p black body saturation is not attained at the TeV-scale. More over, I do not expect that the saturation bounds will be attained at energies that can be reached.

Speaker: Prof. Uri MAOR (Tel Aviv University)

15:00 Studies on B hadron production, spectroscopy and decays at CMS

We review several recent results of the CMS experiment in the field of B hadron productions, spectroscopy and decays. A measurement of the &Lambda_b lifetime using the decay &Lambda_b to J/&psi Lambda is presented. The dataset was recorded with the CMS detector using a trigger selecting unbiased J/&psi decaying to dimuons. We performed a flavour-untagged measurement of the width difference &delta&Gamma_s in the Bs -> J/&psi &phi decays. With an assumption of zero mixing phase, reconstructed Bs signal candidates are used to measure the polarization amplitudes in an angular and proper decay time analysis.

Speaker: Dr Xin Shi (National Taiwan University)

Talk xshi-bph-20121206v4.pdf

15:30 Afternoon Tea

16:00 The Tsallis Distribution at the LHC

Speaker: Prof. Jean Cleymans (University of Cape Town/iThemba LABS)

Talk cleymans_kruger2012.pdf

16:30 Jet physics and vector boson plus jet physics at CMS

We present recent measurements of jet cross sections and their properties, using proton-proton collision data collected with the CMS detector. Measurements of jet production rates in association with W, Z, or photons are also presented. Jet measurements at the LHC can be used to confront predictions of perturbative QCD, are sensitive to new physics signals, and can be used to constrain PDFs.

Speaker: Mr Tom Cornelis (University of Antwerp)

Talk TomCornelis_Kruger2012.pdf

14:30 → 17:00 Parallel Session XI

14:30 Top quark pair production cross section at CMS

Precision measurements are presented of the top-pair production cross section in proton-proton collisions at the LHC at a centre-of-mass energies of 7 and 8 TeV. The data are collected with the CMS experiment in 2011 and 2012. The measurements are performed in several decay channels, the lepton+jets, the dilepton and the fully hadronic channels, including the tau-dilepton and tau+jets modes. B-jet identification is used to increase the purity of the selection. The backgrounds are determined using data-driven techniques. The results are combined with each other and compared with theory predictions.

Speaker: Dr Silvia Costantini (University of Ghent)

15:00 Top Quark production

Measurements of the top quark production cross sections in proton-proton collisions with the ATLAS detector at the Large Hadron Collider are presented. The measurement require no, one or two electrons or muons in the final state (single lepton, dilepton, hadronic channel). In addition, the decay modes with tau leptons are tested (channels with tau leptons). The main focus are measurements of differential spectra of ttbar final states, in particular, measurements that are able to constrain the modelling of additional parton radiation. Measurements of single top-quark production in the t- and Wt-channels are presented and determination of the CKM matrix element |Vtb| is discussed. In addition, the s-channel production is explored and limits on exotic production in single top quark processes are discussed. This also includes the search for flavor changing neutral currents and the search for additional W’ bosons in the s-channel.

Speaker: Dr Danilo Enoque Ferreira de Lima (University of Glasgow)

15:30 Afternoon Tea

16:00 Top quark properties

Properties of the top quark are measured with the ATLAS detector using LHC proton- proton collisions data. Measurements of the top-quark mass and charge, as well as of the polarization of W bosons in top quark decays to probe the Wtb-vertex are presented. In addition, measurements of the spin correlation between top and anti-top quarks as well as of the top- quark charge asymmetry, which constitute important tests of QCD and are sensitive to new physics, are discussed. The search for flavour changing neutral current processes in top quark decays is reviewed.

Speaker: Mrs Lucia Batkova (Comenius University in Bratislava)

16:30 The Physics Case for the LHeC

Speaker: Prof. Bruce Mellado (University of Wisconsin - Madison & The University of the Witwatersrand)

14:30 → 17:00 Parallel Session XII

14:30 Higgs to four leptons searches at the LHC : constraints on Abelian Hidden sector models

Recent results on Higgs searches at the LHC by the ATLAS and CMS collaborations claim the observation of a new boson with properties compatible with the Standard Model (SM) Higgs boson, at a mass of about 126 GeV. The production rate of the new particle seems compatible with the SM prediction. In some models beyond the SM, an Abelian Hidden sector is coupled to the Standard Model, and the resulting exotic Higgs and new gauge (Z') fields are allowed to mix with the corresponding SM fields. This admits new processes such as the decay of the lightest Higgs boson (after mixing) to a pair of new gauge bosons, and the decay of the new gauge bosons to pairs of leptons : H -> Z'Z' -> llll. This modifies the rate of 4-lepton events sought for in the usual SM H -> ZZ(*) -> llll search. Assuming the observed particle is a Higgs boson of a mass of 126 GeV, we investigate the consequences of the addition of this new process to the search for a SM Higgs boson decaying to 4 leptons, and the resulting constraints on the Abelian Hidden sector model parameters. The constraints are drawn in terms of Higgs mixing angle and new gauge boson mass.

Speaker: Dr Mathieu Aurousseau (University of Johannesburg)

Talk Kruger2012_Mathieu.pdf

15:00 Renormalisation running of masses and mixings in UED models

We review the Universal Extra-Dimensional Model compactified on a $S^1/Z_2$ orbifold, and the renormalisation group evolution of quark and lepton masses, mixing angles and phases both in the UED extension of the Standard Model and of the Minimal Supersymmetric Standard Model. We consider two typical scenarios: all matter fields propagating in the bulk, and matter fields constrained to the brane. The resulting renormalisation group evolution equations in these scenarios are compared with the existing results in the literature, together with their implications.

Speaker: Dr Alan Cornell (School of Physics, University of the Witwatersrand)

Talk ASCornell_-_Kruger2012_presentation.pdf

15:30 Afternoon Tea

16:00 Performance of the CMS Electromagnetic Calorimeter and Its Role for the Hunt for the Higgs Boson in the 2 Gamma Channel

The electromagnetic calorimeter of CMS (ECAL) is a hermetic, fine grained and homogeneous calorimeter containing 75848 lead-tungstate (PbWO4) crystals, completed by a silicon preshower installed in front of the endcaps. The ECAL sensitivity to decay modes with electromagnetic objects in the final state, such as narrow resonances decaying into two photons, is achieved through i ts excellent energy and position resolution. The ECAL performance from 2010-2012 is presented in detail and its role in the hunt for the Higgs boson, through the 2-gamma decay mode, is discussed.

Speaker: Dr Federico de Guio (University of Milano-Bicocca and INFN)

Talk deguio_kruger2012_final.pdf

16:30 Turning on the Charm

I will argue that in heavy-ion collisions the observed strong quenching of heavy quark flavors at intermediate momenta has a sizable contribution from binary scatterings in the quark-gluon plasma. To arrive at this conclusion, I go beyond existing approaches in two aspects: (i) by calculating the collision probability beyond leading-log accuracy, taking into account the momentum dependence of the strong coupling, and (ii) using this probability as the basis of a consistent transport description of heavy flavors, formulating their evolution as a Markov process.

Speaker: Prof. Andre Peshier (University of Cape Town)

Talk PESHIER.pdf

17:00 → 17:45 Highlights from STAR

Speaker: Prof. Sonia Kabana (SUBATECH)

Talk SoniaKabana_Kruger2012_RHIC_Highlights_final_online.pdf SoniaKabana_Kruger2012_RHIC_Highlights_final_online.pdf

19:00 → 21:00 Conference Banquet

With guest speaker Kobus de Wet (SANParks)

Friday, 7 December

10:00 → 10:45 Observation of Paramagnetic Fe3+ in Mn/Fe implanted Metal Oxides and III-Nitrides

K. Bharuth-Ram 1, H. P. Gunnlaugson 2, T E Mølholt 3, D. Naidoo 4, R. Mantovan 5, H. Masenda 4, M. Ncube 4, K. Johnston 6, W. Dlamini 1, R. Sielemann 7, H. P. Gíslason 3, G.Langouche 8,S. Ólafsson 3, G. Weyer 2, and the ISOLDE Collaboration 6 1 School of Physics, University of KwaZulu-Natal, South Africa; 2 Institute of Physics and Astronomy, Aarhus University, Aarhus, Denmark; 3 Science Institute, University of Iceland, Reykjavík, Iceland; 4 School of Physics, University of the Witwatersrand, South Africa; 5 Laboratorio MDM IMM-CNR, Agrate Brianza (MB), Italy; 6 EP Division, ISOLDE/CERN, Switzerland; 7 Helmholtz Zentrum – Berlin, Germany; 8 Department of Physics, KU - Leuven, Leuven, Belgium. Theoretical prediction of ferromagnetic behaviour above room temperature in ZnO (and GaN) doped with dilute concentrations (6 – 8%) of transition metal (TM) ions has excited considerable interest because of their potential as semiconductor-compatible magnetic components for spintronic applications. Observation of room temperature ferromagnetism (RTFM) in ZnO doped with TM ions have been reported, however, no clarity exists on the origin of the observed magnetism, which has been attributed to dopant-defect complexes, unintentional precipitation, or to the formation of secondary magnetic phases. The Mössbauer Collabo-ration at ISOLDE/CERN has applied 57Fe emission Mössbauer spectroscopy following the implantation of 57Mn*, to study the nature of the magnetism in ZnO and other metal oxides and III-nitrides. Radioactive beams of 57Mn+ (T½ = 1.5 min) ions are produced at the ISOLDE facility following fission in a UC2 target induced by 1.4 GeV protons and multi-stage element selective laser ionization. High purity beams of intensity of ~3×108 ions/s were implanted with 40-60 keV energy and to fluences below 1012 ions/cm2 into commercially available single crystal samples. The Mössbauer spectra obtained on-line after implantation into ZnO single crystals show magnetic hyperfine sextets originating from Fe in the high-spin Fe3+ state. Measurements in an external magnetic field show that these sextets are not due to ferromagnetic Fe but to paramagnetic substitutional Fe3+ with unusually long relaxation times. Similar high-spin Fe3+ paramagnetic sextet structure is also observed in MgO and alpha-Al2O3. Results obtained for ZnO, alpha-Al2O3 and MgO, as well as preliminary results for GaN, AlN and InN, will be presented.

Speaker: Prof. Krishanlal Bharuth-Ram (University of KwaZulu-Natal, South Africa)

10:45 → 11:30 Heavy Ion Physics from the CMS Collaboration

The talk presents recent results on collisions involving Pb ions from the CMS Experiment at the LHC. Results include jet quenching and jet modification studies; suppression of the production of J/psi and Y particles and their excited states; electroweak boson production; and global and collective features of heavy ion collisions, such as various distributions and azimuthal asymmetry of the final state charged particles.

Speaker: Prof. Pradeep Sarin (IIT, Bombay)

Talk PradeepSarin_Kruger2012_CMSHI_Plenary_AsGiven.pdf

11:30 → 12:00 Morning Tea

12:00 → 12:45 Towards the Little Bang Standard Model

The Little Bangs created in ultrarelativistic heavy-ion collisions share many characteristic features with the cosmological evolution after the Big Bang. I will demonstrate how quantum fluctuations in the initial state of the Little Bang propagate via hydrodynamic evolution (supplemented by an early pre-equilibrated thermalization and a late kinetic freeze-out stage) into the experimentally observed final state, manifesting themselves as fluctuations in the final flow pattern. A harmonic analysis of the final flows, their transverse momentum dependence and their flow angles (the "Little Bang flow fluctuation spectrum") provides detailed information from which the spectrum of gluon fluctuations in the initial state and the transport coefficients of the quark-gluon plasma fluid created in the collisions can be quantitatively extracted.

Speaker: Prof. Ulrich Heinz (The Ohio State University)

Talk Kruger2012_Heinz.pdf

12:45 → 13:30 Searches for Supersymmetry with the CMS detector at the LHC

We present the results of searches for Supersymmetry performed using the datasets collected in 2011-2012 by the CMS experiment at the LHC in pp-collisions at center-of-mass energy of 7 and 8 TeV. The results are interpreted in the light of the cMSSM and simplified models.

Speaker: Prof. Andrew Askew (Florida State University)

Talk Askew_Kruger2012_12_2012.pdf

13:30 → 14:30 Lunch

14:30 → 17:00 Parallel Session XIII

14:30 Implications of LHC results for Supersymmetry

We discuss how the current LHC results, often presented in the context of the CMSSM or simplified models, constrain supersymmetry in general. To this end, we are particularly interested in "natural" or "effective" SUSY" scenarios, which are preferred on the one hand by theoretical considerations, and on the other hand by flavor constraints. Moreover, assuming that the LHC and Tevatron excesses hinting at a Higgs with mass near 125 GeV (and a signal strength somewhat larger than SM expectations in some channels) persist, we assess the extent to which this can be accommodated in minimal and non-minimal SUSY models. Here we are particularly interested in determining the extent to which the Higgs data discriminates between or possibly eliminates potentially realistic GUT scenarios. Finally, combining Higgs and SUSY results with data regarding relic dark matter density and dark matter searches, we discuss predictions for the LHC at 13 TeV.

Speaker: Dr Sabine Kraml (LPSC Grenoble)

Talk SKraml-Kruger2012.pdf

15:00 RHIC and LHC heavy ion collisions with pQCD Boltzmann transport

Over the years a microscopic transport description for modeling the parton dynamics of ultrarelativistic heavy ion collisions at RHIC and at LHC has been developed. The parton cascade BAMPS is based on the solution of the relativistic Boltzmann equation treating perturbative QCD (pQCD) elastic and inelastic bremsstrahlung interactions. Collective effects of the evolving fireball, the depletion of jets by the partonic medium as well as the production and propagation of heavy quarks and heavy quarkonia can be thoroughly investigated within this unified approach. Fast thermalization and a strong buildup of elliptic flow can be understood emerging from the pQCD interactions and has to be contrasted with the ideal liquid sQGP. Most recently, the employed Gunion-Bertsch inelastic collision cross sections are challenged in comparison to the full pQCD inelastic matrix elements and will be discussed. Finally the production, the suppression and the elliptic flow of heavy quarks in line of the new experimental data at LHC will be considered and presented.

Speaker: Prof. Carsten Greiner (University of Frankfurt)

15:30 Afternoon Tea

16:00 Charged particle production in Pb-Pb collisions in ALICE

Global event observables are a fundamental tool to characterize the properties of the strongly interacting medium created in heavy-ion collisions at the LHC. The ALICE experiment measured charged particle multiplicity distributions in Pb-Pb collisions at √s_NN = 2.76 TeV in a wide pseudo-rapidity range (-5<&eta < 5.5) using different techniques. In heavy-ion interactions the centrality of the collision is estimated through a Glauber Monte Carlo fit to multiplicity distributions reconstructed in various detectors. The charged particle yields as a function of particle transverse momentum in Pb-Pb relative to pp collisions are measured to study in-medium energy loss. Charged particle pseudo-rapidity distributions and the nuclear modification factor R_AA will be presented for Pb-Pb collisions at √s_NN = 2.76 TeV. The results will be compared to experimental results at lower energies and to theoretical predictions.

Speaker: Dr Chiara Oppedisano (INFN Sezione di Torino)

14:30 → 17:00 Parallel Session XIV

14:30 Searches for supersymmetry in resonance production, R-parity violating signatures and events with long-lived particles with the ATLAS detector

An extended QCD sector beyond the minimal supersymmetric standard model or the admission of R-parity violation introduces new signatures to the search for supersymmetry at the LHC. Strongly interacting resonances may decay to jets, sleptons may decay via lepton-flavour violating processes and lightest supersymmetric particles may decay into many leptons with or without missing transverse momentum. Several supersymmetric models also predict massive long-lived supersymmetric particles. Such particles may be detected through abnormal specific energy loss, appearing or disappearing tracks, displaced vertices, long time-of-flight or late calorimetric energy deposits. The talk presents recent results from searches supersymmetry in resonance production, R-parity violating signatures and events with long-lived particles with the ATLAS detector.

Speaker: Dr Helen Hayward (University of Liverpool)

15:00 Search for Exotics new particles with the ATLAS detector

Various extensions of the Standard Model predict the existence of new types of particles. We report on several searches for exotics new particles such as: excited lepton, adjonction of a 4th family of heavy chiral fermions, vector-like quarks that couple to light quarks and Z or W bosons. The talk presents recent results with data collected by the ATLAS experiment at the LHC.

Speaker: Dr John Almond (University of Manchester)

15:30 Afternoon Tea

16:00 Evidence for an excess of B to D(*) tau nu decays at BABAR

Speaker: Dr Robert Kowalewski (University of Victoria)

Talk Kowalewski_Kruger2012.pdf

17:00 → 17:45 QCD in Astrophysics

Speaker: Prof. David Blaschke (University of Wroclaw)

18:30 → 20:30 Dinner