IN3P3, 1 premier papier ALICE-MUON organisation des analyses software computing Physique ALICE-MUON

IN3P3, 2 Options pour le premier papier de physique 14 TeV) gigantic statistics expected “difficult” analysis but robust & well documented (UA1, CDF, D0, PHENIX) open heavy flavour x-section unfold muon dN/dpt extract d  (b),  (c)/dpt J/  cross-section di  invariant mass extract J/  signal ( , d  (N)/dpt,d  ) nominal luminosity: 80 seconds with trigger a few hours w/o trigger

IN3P3, 3 Leptons in PHENIX 1.Measurement of single electrons and implications for charm production in Au+Au collisions at sqrt(s)=130 GeV, Phys. Rev. Lett. 88, (2002) 2.J/Psi production in Au-Au collisions at sqrt(s_NN)=200 GeV, Phys. Rev. C 69, (2004) 3.J/Psi production from proton-proton collisions at sqrt(s) = 200 GeV, Phys. Rev. Lett. 92, (2004) 4.Centrality Dependence of Charm Production from a Measurement of Single Electrons in Au+Au Collisions at sqrt(s_NN)=200 GeV, Phys. Rev. Lett. 94, (2005) 5.Measurement of Single Electron Event Anisotropy in Au+Au Collisions at sqrt(s_NN)=200 GeV, Phys. Rev. C 72, (2005) 6.J/psi Production and Nuclear Effects for d+Au and p+p Collisions at sqrt(s_NN) = 200 GeV, Phys. Rev. Lett 96, (2006) 7.Nuclear Modification of Single Electron Spectra and Implications for Heavy Quark Energy Loss in Au + Au Collisions at sqrt(s_NN) = 200 GeV, Phys. Rev. Lett. 96, (2006) 8.Single Electrons from Heavy-Flavor Decays in p+p Collisions at sqrt(s) = 200 GeV, Phys. Rev. Lett. 96, (2006) 9.Measurement of high-p_T Single Electrons from Heavy-Flavor Decays in p+p Collisions at sqrt(s) = 200 GeV, Phys. Rev. Lett. 97, (2006) 10.Energy Loss and Flow of Heavy Quarks in Au+Au Collisions at sqrt(s_NN) = 200 GeV, Phys. Rev. Lett. 98, (2007) 11.J/psi production versus transverse momentum and rapidity in p+p collisions at s**(1/2) = 200-GeV, Phys. Rev. Lett. 98, (2007) 12.J/psi Production vs Centrality, Transverse Momentum, and Rapidity in Au+Au Collisions at s(NN)**(1/2) = 200-GeV, Phys. Rev. Lett. 98, (2007) 13.Measurement of Single Muons at Forward Rapidity in p+p Collisions at sqrt(s) = 200 GeV and Implications for Charm Production, Phys. Rev. D 76, (2007) 14.Cold Nuclear Matter Effects on J/Psi Production as Constrainted by Deuteron-Gold Measurements at sqrt(s_NN) = 200 GeV, Phys. Rev. C 77, (2008) 15.Enhancement of the dielectron continuum in sqrt{s_NN} = 200 GeV Au+Au collisions, arXiv: J/psi Production in sqrt (s_NN)= 200 GeV Cu+Cu Collisions, arXiv: Dilepton mass spectra in p+p collisions at sqrt(s)= 200 GeV and the contribution from open charm, arXiv: single electrons 2.J/psi  dielectrons 3.J/psi  dielectrons & dimuons 4.single electrons 5.single electrons 6.J/psi  dielectrons & dimuons 7.single electrons 8.single electrons 9.single electrons 10.single electrons 11.J/psi  dielectrons & dimuons 12.J/psi  dielectrons & dimuons 13.single muons 14.J/psi  dielectrons & dimuons 15.dielectron continuum 16.J/psi  dielectrons & dimuons 17.dielectron continuum single electrons come first, then dielectrons, dimuons and then single muons time

IN3P3, 4 Single  vs. di  channels: pros & cons open HF (single  )J/  (di  ) luminosityneededneeded (for  only) triggerMB okMB ok, better with trigger statistics500 (a.u.) ~1/500 but still large (  (LHC)=10×  (RHIC)) alignment“not needed” rough is enough (PHENIX  (J/  ) > 100 MeV/c 2 ) efficiency correctionneeded (tracking only?) needed (tracking & trigger?) background understanding difficult but crucial (no  identification) don’t care if large S/B (searching for peaks) signal extractionmodel dependentmodel independent particularity crucial baseline ↔ J/  from B decay single easier than di if identified particles i.e. electrons alternative with single  : blind analysis with tracking-trigger matching  most probably J/  paper comes first & single  paper shortly after other option: NIM-like paper on single  production to come before J/  paper

IN3P3, 5 Analyses MUON dans ALICE 4 groupes de physique dans ALICE PWG1, PWG2, PWG3, PWG4 meetings mensuels + ALICE-Physics-Weeks PWG3 : “Quarkonia and heavy flavours” (électrons, hadrons, muons) Vitrine des activités de physique dans ALICE. Mal adapté pour des discussions détaillées. PWG3-MUON buts : finaliser l’ensemble du software établir les stratégies d’analyse étudier les performances de l’ensemble du startup préparer les premiers papiers moyens : MUON-analysis model & MUON-analysis to-do-list (next slide) mailing-list : 33 membres, ~ 15 actifs (~ 2/3 français, 1/3 italiens) meetings EVO avant les meetings PWG3 coordination : G. Martinez & Philippe C. coordination : F. Antinori & G. Martinez

IN3P3, 6 Analysis model & to-do-list information available on the web people assigned to each item items treated according to priorities to-do-list updated each ~2 months progress regularly presented in offline weeks and PWG3 meetings MUON analysis model

IN3P3, 7 Tasks for first paper (in progress) task0: complete analysis framework task1: alignment - tracking task2: alignment - trigger task3: list runs, detectors & channels for physics - tracking task4: list runs, detectors & channels for physics - trigger task5: efficiency from data - tracking task6: efficiency from data - trigger task7: full simulations with inputs from tasks1-5 (x-check tasks4-5) task8: generation of plots (cf. muon analysis scheme) task9: global normalization parameters (lum, trig eff, dscale, vxt…) task10: manage muon productions

IN3P3, 8 Strategies for computing triggers # events AOD size single muons: low p t TB single muons: high p t TB U.S. dimuons: low p t GB U.S. dimuons: high p t GB L.S. dimuons: low p t GB L.S. dimuons: high p t GB nominal 14 TeV run: L = cm -2 s -1, t = 10 7 s sub-detectors: MUON, SPD, V0, FMD, ZDC, T0 N. Bastid, MUON-PWG3 EVO meeting, June 08  full nominal pp run ~ 5 TB of AOD no need to use the grid for final analyses alignment, calibration, reconst. & AOD prod. within ALICE computing model final analyses can be done locally thanks to the small data volume

IN3P3, 9 Conclusions premiers papiers de physique avec ALICE-MUON définis structure PWG3-MUON très dynamique et très efficace la France y joue un rôle moteur