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Recent results from PHENIX on identified particles and flow

Recent results from PHENIX on identified particles and flow. David Morrison Brookhaven National Laboratory for the PHENIX Collaboration. 13 62 550. Countries Institutions Participants. Put the results together. Y. Akiba QM’05. The matter is strongly coupled. The matter is dense.

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Recent results from PHENIX on identified particles and flow

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  1. Recent results from PHENIX on identified particles and flow David Morrison Brookhaven National Laboratory for the PHENIX Collaboration

  2. 13 62 550 Countries Institutions Participants

  3. Put the results together Y. Akiba QM’05 The matter is strongly coupled The matter is dense PHENIX preliminary The matter modifies jets The matter may melt but regenerate J/y’s The matter is hot

  4. Busy days in PHENIX p+p d+Au Au+Au Cu+Cu 22.4 GeV ? 62.4 GeV 130 GeV 200 GeV Run 1 - 3 Run 4 - 5 Run 6 (?) over 800 physics figures gained “PHENIX Preliminary” status last year

  5. David Morrison, SQM'06

  6. g g h±,e± h±,e± David Morrison, SQM'06

  7. Quantifying a medium effect yield in A+A/number of equivalent p+p collisions RAA = yield in p+p

  8. Au+Au sNN = 200 GeV high pT unidentified hadrons (h±) and p have similar suppression Phys. Rev. C69, 034910 (2004) David Morrison, SQM'06

  9. Au+Au sNN = 200 GeV high pT unidentified hadrons (h±) and p have similar suppression, h suppression shows quenching independent of identity of produced hadron nucl-ex/0601037 David Morrison, SQM'06

  10. Comparison across systems similar pattern across centralities suggests similar effect of medium nucl-ex/0601037 David Morrison, SQM'06

  11. Cu+Cu sNN = 200 GeV smaller system, smaller effect: about 0.5 in central Cu+Cu, cf. 0.2 in central Au+Au David Morrison, SQM'06

  12. Au+Au and Cu+Cu sNN = 200 GeV David Morrison, SQM'06

  13. Au+Au and Cu+Cu sNN = 200 GeV David Morrison, SQM'06

  14. Connecting with 0 RAA at SPS similar Npart similar sNN David Morrison, SQM'06

  15. not quite the pT reach of 200 or 62.4 GeV – but from just 39 hours of running PHENIX Preliminary David Morrison, SQM'06

  16. RAA as a function of sNN David Morrison, SQM'06

  17. RAA as a function of sNN Cu+Cu 22.5 GeV Cu+Cu 62.4 GeV PHENIX Preliminary PHENIX Preliminary David Morrison, SQM'06

  18. p/ varies with sNN in Cu+Cu PHENIX Preliminary PHENIX Preliminary decreasing effect of initial protons, increasing baryon “anomaly” David Morrison, SQM'06

  19. e.g., w,h p+p-p0 compare whadrons, wdielectrons difficult acceptance, efficiency aided by h gg same techniques applied to Ks0p0p0 i.e., gggg in EMCal compare with lower pT charged K and STAR measurement of Ks0 p+p, d+Au Multi-hadron final states Sasha Milov, SQM’06

  20. Anisotropic initial conditions An idea with some history: Ann. Phys. 6, 1 (1959) PRL 32, 741 (1974) David Morrison, SQM'06

  21. Anisotropic initial conditions An idea with some history: Ann. Phys. 6, 1 (1959) PRL 32, 741 (1974) David Morrison, SQM'06

  22. Anisotropic initial conditions An idea with some history: Ann. Phys. 6, 1 (1959) PRL 32, 741 (1974) David Morrison, SQM'06

  23. Anisotropic initial conditions An idea with some history: Ann. Phys. 6, 1 (1959) PRL 32, 741 (1974) David Morrison, SQM'06

  24. z y x Anisotropic initial conditions An idea with some history: Ann. Phys. 6, 1 (1959) PRL 32, 741 (1974) David Morrison, SQM'06

  25. Anisotropic initial conditions An idea with some history: Ann. Phys. 6, 1 (1959) PRL 32, 741 (1974) David Morrison, SQM'06

  26. Anisotropic initial conditions An idea with some history: Ann. Phys. 6, 1 (1959) PRL 32, 741 (1974) David Morrison, SQM'06

  27. Anisotropy at high pT geometry-driven momentum anisotropy geometry-driven absorption anisotropy Maya Shimomura, SQM’06

  28. Data from minimum bias Au+Au collisions at sNN= 200 GeV PHENIX Preliminary (mT - m0) David Morrison, SQM'06

  29. Data from minimum bias Au+Au collisions at sNN= 200 GeV PHENIX Preliminary (mT - m0) David Morrison, SQM'06

  30. Single electron v2 Greco, Ko, Rapp PLB 595 (2004) 202 Shingo Sakai, SQM’06 Andrew Glenn, SQM’06

  31. David Morrison, SQM'06

  32. Value of large datasets divide by RP, centrality, PID Value of precision better statistics, references Varied system size and collision energy connection to SPS results turn-on of observables centrality, geometry systematics Particle ID helps significantly clarify underlying physics e.g., RAA for h, p More and more comprehensive picture of RHI physics e.g., anisotropy vs pT added weight to partonic description, importance of collective phenomena Comprehensive and Detailed David Morrison, SQM'06

  33. Extra slides David Morrison, SQM'06

  34. David Morrison, SQM'06

  35. Partonic flow? Consistent with a picture of flow being largely established at partonic level M. Oldenburg (QM’05)

  36. central Ncoll = 975  94

  37. Glauber* models Woods-Saxon nuclear density distributions Straight line nucleon trajectories Variety of ways to make correspondence with exp’t *Would be better to call our approach “Glauber-inspired” PHOBOS Glauber MC Roy Glauber, meet ... Alfred Nobel

  38. Jet shape vs centrality PHENIX preliminary J. Jia David Morrison, SQM'06

  39. Jet shape vs centrality PHENIX preliminary J. Jia David Morrison, SQM'06

  40. D D Jet shape vs centrality PHENIX preliminary J. Jia Near side : broadening, Away side: splitting

  41. A. Adare

  42. 2 A–C C 0 A B A–B 0 2

  43. 3-particle cumulant: subtract off lower order correlations Au+Au 10% difference in Au+Au average signal per radian2: center – corner = 0.3 ± 0.3 (stat) ± 0.4 (syst) center – cone = 2.6 ± 0.3 (stat) ± 0.8 (syst) J. Ulery (QM’05) David Morrison, SQM'06

  44. Changing the geometry both cases: 100 participants different ellipticity odd harmonics Cu+Au Au+Au

  45. Au+Au Cu+Cu PHOBOS preliminary Elliptic flow in Au+Au and Cu+Cu G. Roland (QM’05)

  46. Off the beaten path David Morrison, SQM'06

  47. A v Dx Perfect fluid? Hydrodynamic flow in idealized case is isentropic: no entropy growth P. Stankus

  48. Entropy grows Volume and velocity are constant, so power heats fluid, generating entropy The fractional rate of increase in entropy is proportional to /s; the smaller this is, the smaller the increase in entropy, and the closer to “perfect” the fluid is.

  49. Low viscosity or high entropy? sQGP is viscous, but its high entropy density compensates Gyulassy, Hirano nucl-th/0506049

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