1 / 36

Status and Recent Results

Status and Recent Results. Matthias Grosse Perdekamp, UIUC and RBRC. PHENIX status and run 2003 performance High sensitivity to rare processes J/  and high pT hadrons in Au-Au, d-Au and p-p collisions

winola
Télécharger la présentation

Status and Recent Results

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Status and Recent Results Matthias Grosse Perdekamp, UIUC and RBRC PHENIX status and run 2003 performance High sensitivity to rare processes J/  and high pT hadrons in Au-Au, d-Au and p-p collisions Brief review of run 2002 results Hadron production at high transverse momenta charged hadrons and 0 in Au-Au and p-p First look at PHENIX d-Au data PHENIX Status and Recent Results

  2. Brazil University of São Paulo, São Paulo China Academia Sinica, Taipei, Taiwan China Institute of Atomic Energy, Beijing Peking University, Beijing France LPC, University de Clermont-Ferrand, Clermont-Ferrand Dapnia, CEA Saclay, Gif-sur-Yvette IPN-Orsay, Universite Paris Sud, CNRS-IN2P3, Orsay LLR, Ecòle Polytechnique, CNRS-IN2P3, Palaiseau SUBATECH, Ecòle des Mines at Nantes, Nantes Germany University of Münster, Münster Hungary Central Research Institute for Physics (KFKI), Budapest Debrecen University, Debrecen Eötvös Loránd University (ELTE), Budapest India Banaras Hindu University, Banaras Bhabha Atomic Research Centre, Bombay Israel Weizmann Institute, Rehovot Japan Center for Nuclear Study, University of Tokyo, Tokyo Hiroshima University, Higashi-Hiroshima KEK, Institute for High Energy Physics, Tsukuba Kyoto University, Kyoto Nagasaki Institute of Applied Science, Nagasaki RIKEN, Institute for Physical and Chemical Research, Wako RIKEN-BNL Research Center, Upton, NY University of Tokyo, Bunkyo-ku, Tokyo Tokyo Institute of Technology, Tokyo University of Tsukuba, Tsukuba Waseda University, Tokyo S. Korea Cyclotron Application Laboratory, KAERI, Seoul Kangnung National University, Kangnung Korea University, Seoul Myong Ji University, Yongin City System Electronics Laboratory, Seoul Nat. University, Seoul Yonsei University, Seoul Russia Institute of High Energy Physics, Protovino Joint Institute for Nuclear Research, Dubna Kurchatov Institute, Moscow PNPI, St. Petersburg Nuclear Physics Institute, St. Petersburg St. Petersburg State Technical University, St. Petersburg Sweden Lund University, Lund 12 Countries; 57 Institutions; 460 Participants USA Abilene Christian University, Abilene, TX Brookhaven National Laboratory, Upton, NY University of California - Riverside, Riverside, CA University of Colorado, Boulder, CO Columbia University, Nevis Laboratories, Irvington, NY Florida State University, Tallahassee, FL Georgia State University, Atlanta, GA University of Illinois Urbana Champaign, IL Iowa State University and Ames Laboratory, Ames, IA Los Alamos National Laboratory, Los Alamos, NM Lawrence Livermore National Laboratory, Livermore, CA University of New Mexico, Albuquerque, NM New Mexico State University, Las Cruces, NM Dept. of Chemistry, Stony Brook Univ., Stony Brook, NY Dept. Phys. and Astronomy, Stony Brook Univ., Stony Brook, NY Oak Ridge National Laboratory, Oak Ridge, TN University of Tennessee, Knoxville, TN Vanderbilt University, Nashville, TN PHENIX Status and Recent Results

  3. Run Year Species s1/2 [GeV ] Ldt Ntot 01 2000 Au-Au 130 1 mb-1 10M 02 2001/2002 Au-Au 200 24 mb-1 170M p-p 200 0.15 pb-1 3.7G 03 2002/2003 d-Au 200 2.74 nb-1 5.5G p-p 200 ongoing PHENIX: Run History 2000 2002/2003 2001/2002 PHENIX Status and Recent Results

  4. PHENIX Status in 2003: Design Configuration! Central Arm Tracking Drift Chamber Pad Chambers Time Expansion Chamber Muon Arm Tracking Muon Tracker: North Muon Tracker Calorimetry PbGl PbSc Particle Id Muon Identifier: North Muon Identifier RICH TOF TEC Global Detectors BBC ZDC/SMD Local Polarimeter Forward Hadron Calorimeters NTC MVD Online Calibration and Production PHENIX Status and Recent Results

  5. The PHENIX Detector: Central Arms PHENIX Status and Recent Results

  6. Two Collisions as seen by the PHENIX Central Arms 2001/2002 Au-Au 2001/2002 d-Au PHENIX Status and Recent Results

  7. DAQ and Trigger System: Rare Event Capability Buffers: 4s deep EMC Trigger configuration in d-Au o Raw rate < 50 kHz o First level trigger: 3 minimum bias 1single electron (J/) 1electron pair () 4 photon (0.8, 2.1, 2.8, 3.5 GeV) 2 muon 2 di-muon (J/) o Level 2: off o Extend to 300kHz in p-p … 14 Subsystems (350000 Channels read every 106 ns leading to a data volume: 3.5TB/s) Front End Electronics (25000 Channels) DCMs Event Builder SEB (37 CPUs) Subsystem Trigger Processor … 6 Subsystems (NTC, BBC, ZDC, EMC, RICH, muID) 120MB/s ATP (23 CPUs) Level 1 Trigger Processor Write events at 1.0kHz Trigger Request not to exceed 1kHz 120MB/s Data Storage 40 TB Primitives for higher level trigger decision PHENIX Status and Recent Results

  8. VA036 VA057 VA034 VA046 VA047 VA033 VA035 VA045 Online Calibration, Evaluation and Production DAQ Calibration:BBC, EMC, FCAL, ... Evaluation J/(->ee,), 0 Bufferbox a/b PHENIX Online PHENIX online pc-farm Filter(shift crew) Pulser 0 Pulser 1 Pulser 2 Electron Photon: 2.1 GeV Di-muons PHENIX Status and Recent Results

  9. Run 2003 d-Au 200 GeV PHENIX Status and Recent Results

  10. Run 2003 d-Au 200 GeV: Performance of the Muon Spectrometers opposite-sign pairs same-sign pair bkgd ~ 211 J/Y’s 3.11 ± .02 GeV s = 143 ± 14 MeV Di-muon invariant mass spectra opposite-sign pairs same-sign pair bkgd Yields Yields South North PHENIX ONLINE PHENIX ONLINE ~ 232 J/Y’s 3.18 ± .03 GeV s = 164 ± 27 MeV Yields Yields Invariant Mass [GeV/c] Invariant Mass [GeV/c] PHENIX Status and Recent Results

  11. PHENIX results • Run -2 finalresults: • High pT pi0 (Au+Au @ 200 GeV): submitted to PRL nucl-ex/0304022 • High pT pi0 (p+p @ 200 GeV): submitted to PRL hep-ex/0304038 • Elliptic flow of identified particles (Au+Au @ 200 GeV): to be submitted to PRL • J/Psi yields (Au+Au @ 200 GeV) to be submitted to PRC • J/Psi yields (p+p @ 200 GeV) to be submitted to PRL • p,pbar high pT enhancement (Au+Au @ 200 GeV) to be submitted to PRL • Run-2 preliminary results: • dN/dy and dE_T/dy (Au+Au @ 200 GeV) • Identified charged particle spectra and yields (Au+Au @ 200 GeV) • Inclusive charged particle at high pT (Au+Au @ 200 GeV) • phi -> KK (Au+Au @ 200 GeV) • Event-by-event fluctuations (Au+Au @ 200 GeV) • Di-Lepton continuum (Au+Au @ 200 GeV) • Two-pion correlations (Au+Au @ 200 GeV) • d and dbars (Au+Au @ 200 GeV) • Run-3 preliminary results: • High pT pi0 (d+Au @ 200 GeV) • High pT inclusive charged particles (d+Au @ 200 GeV) PHENIX Status and Recent Results

  12. Final to be submitted to PRL Run 2002 p-p 200 GeV: J/ Invariant Mass Distribution Invariant Mass [GeV/c] Invariant Mass [GeV/c] PHENIX Status and Recent Results

  13. Final to be submitted to PRL Run 2002 p-p 200 GeV: J/ pT Distribution pT [GeV/c] pT [GeV/c] <pT> = 1.80 ± 0.23 (stat) ± 0.16 (sys) GeV PHENIX Status and Recent Results

  14. Final to be submitted to PRL Run 2002 p-p 200 GeV: J/ Rapidity Distribution rapidity  = 3.98 ± 0.62 (stat) ± 0.56 (sys) ± 0.41(abs) mb PHENIX Status and Recent Results

  15. Final to be submitted to PRL Run 2002 p-p 200 GeV: Comparison with Previous Experiments PHENIX Status and Recent Results

  16. Run 2002 Au-Au 200GeV: J/ Production Centrality Dependence 40-90% most central Ncoll=45 20-40% most central Ncoll=296 0-20% most central Ncoll=779 R.L. Thews, M. Schroedter, J. Rafelski Phys. Rev. C63 054905 (2001): Plasma coalesence model for T=400MeV and ycharm=1.0,2.0, 3.0 and 4.0. L. Grandchamp, R. RappNucl. Phys. A&09, 415 (2002) and Phys. Lett. B 523, 50 (2001): Nuclear Absorption+ absoption in a high temperature quark gluon plasma A. Andronic et. Al. Nucl-th/0303036 Proton Final to be submitted to PRC PHENIX Status and Recent Results

  17. jet production in quark matter hadrons leading particle q q hadrons leading particle Hadron Production at Large Transverse Momenta • in colored “quark matter” partons expected to loose significant energy via gluon bremsstrahlung • attenuation or absorption of jets “jet quenching” • suppression of high pT hadrons • modification of angular correlation • changes of particle composition PHENIX Status and Recent Results

  18. Collision Geometry -- “Centrality” Spectators Participants For a given b, Glauber model predicts Npart (No. participants) and Nbinary (No. binary collisions) 15 fmb 0 fm 0 Npart 394 0 Nbinary 1200 PHENIX Status and Recent Results

  19. Quantify Nuclear Modification of Hadron Spectra 1. Compare Au+Au to nucleon-nucleon cross sections 2. Compare Au+Au central/peripheral Nuclear Modification Factor: nucleon-nucleon cross section <Nbinary>/sinelp+p AA AA If no “effects”: R < 1 in regime of soft physics R = 1 at high-pT where hard scattering dominates Suppression: R < 1 at high-pT AA AA AA AA PHENIX Status and Recent Results

  20. Run 2000 p-p 130 GeV: Discovery of High pT Hadron Suppression at RHIC PHENIX o Charged hadron and neutral pion results with independent systematic errors! o Extrapolation from UA1 as proton reference. PHENIX Status and Recent Results

  21. Final submitted to PRL Run 2001/2002 p-p + Au-Au 200 GeV: High pT p-p and Au-Au 0 Results p-p hep-ex/0304038 Au-Au nucl-ex/0304022 Good agreement with NLO pQCD Data reach pT=12 GeV PHENIX Status and Recent Results

  22. Final submitted to PRL Run 2001/2002 Au-Au 200 GeV: RAA: High pT Suppression Au-Au nucl-ex/0304022 Au-Au nucl-ex/0304022 PHENIX Status and Recent Results

  23. Final to be submitted to PRL Run 2001/2002 Au-Au 200 GeV: Particle Composition at High pT • p/ ~1 at high pT for central collisions • In peripheral collisions, p/ ~ 0.4 PHENIX Status and Recent Results

  24. Final to be submitted to PRL Run 2001/2002 Au-Au 200 GeV: Central to Peripheral Ratio for Protons and Pions • - No apparent suppression in proton yields for 2 <pT<4 GeV/c • Different production mechanism for protons? PHENIX Status and Recent Results

  25. Final to be submitted to PRL Run 2001/2002 Au-Au 200 GeV: Particle Composition at high pT Central (h++h-)/2p0 ~ 50% greater in central than peripheral at mid pT similar again for pT>5 GeV/c Peripheral PHENIX Status and Recent Results

  26. Run 2002/2003:d-Au and p-p at 200GeV ALL versus pT p-p run goal: Access gluon polarization through double spin asymmetries ALL inclusive 0production Required: 30% Polarization and Ldt=500nb-1 PHENIX Status and Recent Results

  27. Successful Rotator Commissioning/Local Polarimetry Rotators on--> radial polarization Rotators on --> vertical polarization Yellow Blue See Kiyoshi Tanida’s talk Friday! PHENIX Status and Recent Results

  28. Run 2002/2003:High pT Spectra in d-Au at 200 GeV PHENIX PRELIMINARY dAu min bias + EMC trigger pT [GeV/c] pT [GeV/c] PHENIX Status and Recent Results

  29. Run 2002/2003 d-Au 200 GeV: Charged Hadrons RAA for d+Au: RdA • Charged hadron are measured with tracking detectors in two independent arms • Cronin type enhancement relative to binary scaling PHENIX Status and Recent Results

  30. PHENIX Preliminary 1s errors Run 2002/2003 d-Au 200 GeV: 0RAA for d+Au collisions: RdA Neutral pions are measured with 2 independent Calorimeters – PbSc and PbGl • 2 results agree within errors • Not suppressed relative to binary scaling PHENIX Status and Recent Results

  31. PHENIX Preliminary 1s errors Run 2002/2003 d-Au 200 GeV: RdA for charged hadrons compared to p0 “Cronin” enhancement more pronounced in the charged hadron measurement Possibly a larger effect in protons at medium pT PHENIX Status and Recent Results

  32. Run 2002/2003 d-Au 200 GeV: Neutron tagged p-A collisions n ZDC FCAL Energy Deposit p Neutron tagged events are enhanced in ultra-peripheral collisions ZDC Energy Deposit PHENIX Status and Recent Results

  33. Run 2002/2003 d-Au 200 GeV: Centrality Dependence of RdA Comparison of ultra-peripheral events (<Ncoll>=3.6+/-0.4) to minimum bias (<Ncoll>=8.5+/-0.7) No centrality dependence observed! PHENIX Status and Recent Results

  34. PHENIX Preliminary Run 2002/2003 d-Au 200 GeV: 0RAA Theory and Experiment for central Au+Au and d+Au collisions Theoretical predictions: d+Au:I. Vitev, nucl-th/0302002 and private communication. Au+Au:I. Vitev and M. Gyulassy, hep-ph/0208108, to appear in Nucl. Phys. A; M. Gyulassy, P. Levai and I. Vitev, Nucl. Phys. B 594, p. 371 (2001). anti-shadowing shadowing PHENIX Status and Recent Results

  35. Run 2002/2003 d-Au 200 GeV: h+/- RAA Theory and Experiment for central Au+Au and d+Au collisions without shadowing PHENIX Status and Recent Results

  36. Summary PHENIX operates in design configuration Successful d-Au and continuing p-p running Wealth of results from Run-2 on Au-Au and p-p physics Cronin like enhancement at high pT in d-Au We live in interesting times, more results in the near future! PHENIX Status and Recent Results

More Related