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Recontres de Moriond, March 17 2005

Recontres de Moriond, March 17 2005. High PT Physics at RHIC. Xin-Nian Wang Lawrence Berkeley National Laboratory. QCD phase transition. (approx.) Chiral symmetry and its spontaneous breaking:. Goldstone boson and chiral condensate. SU(3) gauge symmetry:. Asymptotic freedom. Confinement.

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Recontres de Moriond, March 17 2005

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  1. Recontres de Moriond, March 17 2005 High PT Physics at RHIC Xin-Nian Wang Lawrence Berkeley National Laboratory

  2. QCD phase transition (approx.) Chiral symmetry and its spontaneous breaking: Goldstone boson and chiral condensate SU(3) gauge symmetry: Asymptotic freedom Confinement scale anomaly (break scale invariance)

  3. Lattice QCD results F. Karsch ‘2001

  4. Medium Response Function Dynamic System: Photon or dilepton emission (space-like photon) J/Y suppression QCD Response: Strong quark scattering

  5. DIS off Nuclei e- Frag. Func.

  6. Twist Expansion

  7. LPM interference Effect Formation time

  8. Modified Fragmentation Modified splitting functions Two-parton correlation: LPM Guo & XNW’00

  9. HERMES data E. Wang & XNW 2000 in Au nuclei

  10. Parton Energy Loss BDPM Gyulassy Vitev Levai Wang & Wang Wiedemann; Zakharov Quark energy loss = energy carried by radiated gluon

  11. High pt spectra in pp collisions H. Zhang J. Owens E. Wang XNW 2005

  12. High pt spectra in Au+Au H. Zhang,E. Wang J. Owens, XNW 2005

  13. Jet Quenching at RHIC XNW’03

  14. Geometry of dense matter jet jet Azimuthal asymmetry Non-central collisions

  15. No suppression in d+Au STAR PHENIX

  16. pT spectra at large rapidity Gluon saturation or color glass condensate ? Catalin Ristea (BRHAMS) Edmond Iancu (Theory) Greg Rakness (STAR)

  17. Energy Dependence of quenching D. d’Enterria, Hard Probes 2004

  18. Effect of non-Abelian energy loss Eskola Honkanen Salgado Wiedemann Qun Wang & XNW nucl-th/0410079 Fixed pT=6 GeV DEg=DEq DEg=2DEq

  19. Dihadron Correlation Pedestal&flow subtracted Pedestal&flow subtracted trigger Df pTtrig=4-6 GeV pT=2-4 GeV

  20. Away-side suppression

  21. Modification of the dihadron distribution STAR preliminary Pedestal&flow subtracted z Effect of longitudinal flow C. Salgado

  22. Jet Remnants PHENIX STAR

  23. Angular distribution of radiative gluons Induced Bremsstrahlung: Radiation in vacuum q Further interaction of the radiated gluons with the medium?

  24. Sonic Boom Casalderrey-Solana, Shuryak and Teaney Linearize disturbance qM Trigger

  25. Summary • Large suppression of high pT spectra • Strong medium modification of jet structure • 30 times higher gluon density than cold nuclei

  26. Bulk Elliptic Flow Hydro-dynamics calc. Pressure gradient anisotropy

  27. Summary • Large suppression of high pT spectra • Strong medium modification of jet structure • 30 times higher gluon density than cold nuclei • Strongly interacting quark-gluon plasma • Beginning of jet tomography study • Details of modified fragmentation • Heavy quark fragmentation (R. Averbeck) • Dihadron fragmentation • Jet-gamma events

  28. Di-hadron fragmentation function h1 h2 jet Majumder

  29. Future of Jet quenching STAR preliminary STAR preliminary g+jet correlation in Au+Au in run4? More accurate determination of initial Et

  30. Modification for Heavy Quarks (1) Slow clock for formation time (2) Color factor (3) Dead cone effect DEQ<DEg, DEq Djordjevic & Gyulassy Zhang & XNW Armesto,Dainese, Salgado & Wiedemann Zhang & XNW

  31. Charm quark Large charm quark Suppression? Hadronic scattering?

  32. Parton recombination Hwa; Fries Particle or parton correlations are not trivial

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