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PHENIX Highlights II Photons, Hadronization and Thermalization

PHENIX Highlights II Photons, Hadronization and Thermalization. Matthias Grosse Perdekamp – UIUC and RBRC. for the PHENIX Collaboration. I: Propagation of Partons in a Colored Medium John Lajoie, Iowa State University II: Photons, Hadronization and Thermalization Photons

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PHENIX Highlights II Photons, Hadronization and Thermalization

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  1. PHENIX Highlights IIPhotons, Hadronization and Thermalization Matthias Grosse Perdekamp – UIUC and RBRC for the PHENIX Collaboration • I: Propagation of Partons in a Colored Medium • John Lajoie, Iowa State University • II: Photons, Hadronization and Thermalization • Photons • Thermalization • Di-Leptons • The Baryon Anomaly Quark Matter 2006 - Shanghai, China - Slide 1

  2. From Budapest to Shanghai • Partonic Matter: PHENIX Evidence Published • (1) Centrality dependence of direct photon production in √s = 200 GeV Au + Au collisionsPhys.Rev.Lett.94:232301,2005 • (2) Modifications to di-jet hadron pair correlations in Au+Au collisions at √s = 200 GeVPhys.Rev.Lett.97:052301,2006 • (3) J/psi production and nuclear effects for d+Au and p+p collisions at √sNN = 200 GeV Phys.Rev.Lett.96:012304,2006 • (4) Single electrons from heavy flavor decays in p+p collisions at √s = 200-GeVPhys.Rev.Lett.96:032001,2006 • (5) Measurement of identified π0 and inclusive photon v2 and implication to the direct • photon production in √sNN = 200-GeV Au+Au collisions.Phys.Rev.Lett.96:032302,2006 • (6) Jet structure from di-hadron correlations in d+Au collisions at √sNN = 200-GeV • Phys.Rev.C73:054903,2006. • (7) Nuclear modification of electron spectra and implications for heavy quark • energy loss in Au+Au collisions at √sNN = 200 GeV • Phys.Rev.Lett.96:032301,2006 • (8) Common suppression pattern of eta and π0 mesons at high transverse momentum • in Au+Au collisions at √SNN = 200 GeVPhys.Rev.Lett.96:202301,2006 • Nuclear effects on hadron production in d+Au and p+p collisions at √sNN = 200 GeV • Phys.Rev.C74:024904,2006 • (10) Azimuthal angle correlations for rapidity separated hadron pairs in d + Au • Collisions at √sNN = 200-GeVPhys.Rev.Lett.96:222301,2006 • (11) Jet properties from di-hadron correlations in p+p collisions at √s = 200 GeVPhys.Rev.D74:072002,2006 Quark Matter 2006 - Shanghai, China - Slide 2

  3. Quark Matter 2006: Exploring the matter New PHENIX Results (1) Measurement of direct photon production in p + p collisions at √s = 200 GeV. hep-ex/0609031 (2) Measurement of single muons at forward rapidity in p+p collisions at √s = 200-GeV and implications for charm production. hep-ex/0609032 (3) High transverse momentum eta meson production in p+p, d+Au and Au+Au collisions at √sNN = 200 GeV nucl-ex/0611006 (4) A detailed study of high-pT neutral pion suppression and azimuthal anisotropy in Au+Au collisions at √sNN = 200 GeV nucl-ex/0611007 (5) Energy loss and flow of heavy quarks in Au+Au collisions at √sNN = 200 GeV nucl-ex/0611018 (6) J/psi productionin p+p collisions at √s = 200 GeV nucl-ex/0611020 (7) System size and energy dependence of jet induced hadron pair correlation shapes in Cu-Cu and Au-Au collisions at √sNN = 200 GeV nucl-ex/0611019 (8) J/psi production in Au+Au collisions at √s = 200 GeV nucl-ex/0611020 (9) Pair production of protons and anti-protons in Au+Au Collisions at √sNN = 200 GeV nucl-ex/0611016 Nov. 9 The past week on nucl-ex … Quark Matter 2006 - Shanghai, China - Slide 3

  4. Exploring Partonic Matter with High Luminosity in PHENIX 2006 Hadron Blind Detector low mass di-electrons Reaction Plane Detector improved reaction plane eg. v2(γ) TOF-West hadron anomaly Forward EMC (MPC) low x, initial state 2006- 2009 Silicon Vertex Tracker heavy quark physics, jets Muon trigger heavy flavor trigger 2008 – 2011 Forward Vertex Tracker heavy quark physics, jets Nosecone Calorimeter jets, γ-jet, heavy quark physics Driven by growing interest: Year --- Institutions --- Participants 2001 53 420 2003 57 460 2006 68 550 complete funded PHENIX upgrades RHIC II  10 x Luminosity Quark Matter 2006 - Shanghai, China - Slide 4

  5. The PHENIX Collaboration QM 2006 20 talks 45 posters Quark Matter 2006 - Shanghai, China - Slide 5

  6. Run 4 ∫Ldt Extends Direct Photons Tadaaki Isobe Sun 2:00pm Direct Photon Spectra vs Centrality extend to high pT 1 < pT < 20 GeV Min. Bias 0-10% 08-92% high pT Quark Matter 2006 - Shanghai, China - Slide 6

  7. Direct g RAA at 200 GeV Tadaaki Isobe Sun 2:00pm Direct g RAA with measured p+p reference data ηπ0 Quark Matter 2006 - Shanghai, China - Slide 7

  8. Direct Photons at Low pT QM 2005: Data consistent with thermal+ NLO pQCD pQCD uncertain at low pT Gordon and Vogelsang Phys. Rev. D48, 3136 (1993) Thermal d’Enterria, Perresounko Eur.Phys.J.C46:451-464,2006 (a) New experimental method for the measurement of direct photons  external conversion from beam pipe (b) p-p and d-Au reference data: work in progress. Quark Matter 2006 - Shanghai, China - Slide 8

  9. o New measurement with external conversions o Improved systematics o Agreement with previous results Low pT  new conversion method Dmitri Peressounko, Sat 5:20pm Direct Photons, Au+Au at 200 GeV External conversions Internal Conversions Quark Matter 2006 - Shanghai, China - Slide 9

  10. Photons o Extended range to high and low pT o Previous low pT analysis confirmed o Started jet-photon correlations Quark Matter 2006 - Shanghai, China - Slide 10

  11. Flow for Light Hadrons is “Perfect” Arkadij Taranenko Sun 2:20 pm v2 scales with the transverse kinetic energy! Quark Matter 2006 - Shanghai, China - Slide 11

  12. Flow:Light Quarks→ Strange → Charm Arkadij Taranenko Sun 2:20 pm • Scaling flow para- meters by quark content nq resolves meson-baryon sepa- ration of final state hadrons baryons mesons Quark Matter 2006 - Shanghai, China - Slide 12

  13. Flow: Light Quarks → Strange→ Charm Arkadij Taranenko Sun 2:20 pm mesons vs baryons  flow scales with nq Quark Matter 2006 - Shanghai, China - Slide 13

  14. Flow: Light Quarks → Strange → Charm Shingo Sakai Sat 5:20pm (1) Consistent with c-quark thermalization (2) large cross section is needed in AMPT ~10 mb (3) Resonance state of D & B in sQGP [Phys.Lett. B595 202-208] [PRC72,024906] [PRC73,034913]  indicates quark level thermalization & strong coupling Quark Matter 2006 - Shanghai, China - Slide 14

  15. Flow o Scaling properties consistent with ideal fluid hydrodynamics o Consistent with quark level thermalization and strong coupling o Observe flow for light, strange, and charm quarks q What else can we do with charm ? Quark Matter 2006 - Shanghai, China - Slide 15

  16. Di-Leptons in the Intermediate Region (IMR) Sarah Campbell, Sun 5:20pm cc ee data IMR Quark Matter 2006 - Shanghai, China - Slide 16

  17. PHENIX Preliminary Sarah Campbell, Sun 5:20pm Di-lepton pairs: Centrality Dependence 0-10% -- central 60-100% -- peripheral PHENIX Preliminary Quark Matter 2006 - Shanghai, China - Slide 17

  18. Nuclear Modification in Charm • Dielectron: RCP in Charm Region 1.4< mee < 2.8 GeV/c2 • Single Electron: RAA at low and high pT • Similar charm suppression patterns Sarah Campbell, Sun 5:20pm RCP for 1.4 < mee < 2.8 GeV/c2, Au-Au Quark Matter 2006 - Shanghai, China - Slide 18 New to Quark Matter 2006

  19. PHENIX preliminary Nuclear Modification in Charm RCP for 1.4 < mee < 2.8 GeV/c2, Au-Au • Dielectron: RCP in Charm Region1.4<mee < 2.8 GeV/c2 • J/Psi: RAA • Similar charm suppression patterns Sarah Campbell, Sun 5:20pm Quark Matter 2006 - Shanghai, China - Slide 19 New to Quark Matter 2006

  20. ω e+e-, π0π+π-,π0γ in pp, dAu and AuAu p+p d+Au Au+Au hadronic Yuriy Riabov, Sun 2:20pm 0+- (0)p+p √s=200 GeV d+Au√sNN =200 GeV 0Au+Au √sNN=200 GeV ρ,ω, e+e-p+p√s=200 GeV ω e+e-Au+Au √sNN=200 GeV PHENIX Preliminary leptonic PHENIX mapped out high pTω in p+p, d+Au & produced a first result in Au+Au ω,e+e- in p+p are not ready yet, but the signal there is very clean Quark Matter 2006 - Shanghai, China - Slide 20

  21. Di-Leptons o First centrality dependence available o Charm suppression in this channel o Omega and Phi spectra Quark Matter 2006 - Shanghai, China - Slide 21

  22. Multiplicity Fluctuation: Universal Scaling Jeff Mitchell, Sun 5:00pm All points are scaled to match the 200 GeV Au+Au data curve to illustrate the scaling. 0.2<pT<2.0 GeV/c s2/m2α Npart-1.40±0.03 0.2<pT<0.75 GeV/c Quark Matter 2006 - Shanghai, China - Slide 22

  23. Medium Properties: Source Size Poster: Akitomo Enokizono • Pion radii scale w/ mult. across system/energy • Consistent with freeze-out scenario Quark Matter 2006 - Shanghai, China - Slide 23

  24. p/ p/ vs centrality, Au+Au, √s = 200 GeV Increased ∫Ldt and PID Masahiro Konno, Sun 2:20 pm p/ - p/ (pbar/) ratios seem to turn over at intermediate pT, and close to the value of fragmentation at higher pT. - Consitent with expectations from recombination - Indicating transition from soft to hard at intermediate pT. Quark Matter 2006 - Shanghai, China - Slide 24

  25. p/- p/+ ratios vs sNN, central Tatsuya Chujo, Sat 3:00 pm Ratios constant in pp p/- increases in AA vs √s p/+ decreases in AA Quark Matter 2006 - Shanghai, China - Slide 25

  26. _ p & p Near Side CorrelationsBaryon Associated with p-p pairs Anne Sickles, Wed. 4:00 pm opposite sign pairs: CORRELATED same sign pairs: NO CORRELATION _ Quark Matter 2006 - Shanghai, China - Slide 26

  27. p0 RAA in Cu+Cu at different √sNN Comparison of p0 in Cu+Cu for 22, 62, 200 GeV Suppression increases with energy Baldo Sahlmueller, Sun 2:00pm RHIC High luminosity + flexibility to vary collisions systems + energies Quark Matter 2006 - Shanghai, China - Slide 27

  28. Conclusions Direct PhotonsExtended range to high and low pT Previous low pT analysis confirmed Started Jet photon correlations FlowObserved flow for light, strange, and charm quarks Observed scaling properties consistent with ideal fluid hydrodynamics Di-Leptons First centrality dependence available Charm suppression in this channel ? Baryon anomalyBaryon/meson studies extended to hard region, ratio returns to vacuum expectation PHENIX is well positioned to explore the sQGP with high luminosity and improved detector capabilities Quark Matter 2006 - Shanghai, China - Slide 28

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