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Quark Matter 2005, Budapest

Quark Matter 2005, Budapest. Jet and Leading Hadron Production. Xin-Nian Wang Lawrence Berkeley National Laboratory. Asymptotic Freedom and QCD. David J. Gross H. David Politzer Frank Wilczek Nobel Prize in Physics 2004. Asymptotic freedom Scale anomaly Phase transition.

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Quark Matter 2005, Budapest

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  1. Quark Matter 2005, Budapest Jet and Leading Hadron Production Xin-Nian Wang Lawrence Berkeley National Laboratory

  2. Asymptotic Freedom and QCD David J. Gross H. David Politzer Frank Wilczek Nobel Prize in Physics 2004 • Asymptotic freedom • Scale anomaly • Phase transition

  3. Hard processes in heavy-ion collisions pQCD leading particle q q H. Zhang,J. Owens, E. Wang XNW, in preparation leading particle

  4. Before the Beginning…

  5. Single Spectra Suppression ET PHENIX XNW and M. Gyulassy Phys. Rev. Lett. 68, 1480 (1992)

  6. Non-suppression in p+A PHENIX XNW, Phys. Rev. C 61, 064910 (2000) [hep-ph/9812021]

  7. Azimuthal Anisotropy STAR XNWPhys. Rev. C 63, 054902 (2001) Gyulassy, Vitev & XNW Phys. Rev. Lett. 86, 2537 (2001)

  8. Suppression of Back-side Correlation Pedestal&flow subtracted STAR, Phys. Rev. Lett. 90, 082302 (2003)

  9. Modified Fragmentation DGLAP-like Guo & XNW’00

  10. Parton Energy Loss and QGP Gluon density correlation: LPM interference BDPM; Gyulassy Vitev Levai Wang & XNW; Wiedemann; Zakharov

  11. pQCD Analysis of Jet Quenching Parton distr. in nuclei & pT broadening Modified Frag. Fun. E. Wang & XNW (2002), XNW (2004) Gyulassy, Levai & Vitev (2002) Eskola, Honkanen, Salgado & Wiedemann (2005) Q. Wang & XNW (2005) Turbide, Gale, Jeon & Moore (2005) Dainese, Loizides & Paic (2005) …

  12. Jet Quenching at RHIC XNW, PLB595(04)165. LO analysis,

  13. Energy Dependence of Jet Quenching D. d’Enterria, Hard Probes 2004 XNW, PLB579(2004)299 63 GeV

  14. Effect of non-Abelian energy loss Eskola Honkanen Salgado Wiedemann Q. Wang & XNW nucl-th/0410079 pT=6 GeV DEg=DEq DEg=2DEq q=0.9 0.1 Effects in heavy/light hadron ratio– Armesto, parallel 3c

  15. Nuclear Size Dependence

  16. Sensitivity of RAA • Cronin effect • Slope of the jet • spectra • E-dependence of • the energy loss Gyulassy & Vitev Eskola,Honkanen Salgado,Wiedemann

  17. Back-2-back Dihadron Correlations  = STAR preliminary Pedestal&flow subtracted Majestero ET XNW, PLB595(04)165.

  18. Modified Dihadron Fragmentation h1 h1 h2 h2 h1 h1 h2 h2 jet Majumder & XNW’04,05 Majumder, parallel 3b

  19. Modified Dihadron Fragmentation Triggering h1 D(z1,z2)/D(z1) Pedestal&flow subtracted E. Wang & XNW, PRL89 (2002) 162301 Hermes Preliminary Majumder & XNW nucl-th/0412061 Majumder, parallel 3b

  20. Soft hadrons rings qM PHENIX Shock wave? Stoecker’04 Casalderrey-Solana,Shuryak & Teaney ‘04 Casalderrey-Solana (parallel 3b)

  21. LPM & Angular Correlation Multiple Scattering in QCD Formation time Radiation in vacuum

  22. LPM & Cherenkov-like Bremsstrahlung Dielectric constant Majumder & XNW nuth-0507063 J. Ruppert & B. Muller PLB619(2005)123. Dremin, JETP(1979), hep-ph/0507167 Dremin (parallel 10a)

  23. Resonances in QGP above Tc? F. Karsch & Laermann ‘03 J/Y survives at T=1.6-2 Tc Could there be other resonances? Shuryak & Zahed ‘04 Asakawa &Hatsuda ’04 S. Datta, et al ‘04 Lee, Mocsy (parallel 10c); Mannarelli, Petreczky (parallel 7a)

  24. Dielectric Constant in QGP f f1 f f2 Koch, Majumder & XNW’05 See Majumder (parallel 3b) Strong p-dependence Cherenkov angle

  25. Future of Jet Quenching I g-jet Events XNW, Huang & Sarcevic,PRL77(96)231 • No-trigger bias • Initial energy • Surface emission • Correlation background due to v2

  26. Future of Jet Quenching II • Heavy quark jet quenching • Djordjevic, Rapp, Teaney (parallel 5b) • B. Zhang (parallel 5a) • Parton recombination at intermediate pt • Ko (parallel 2b), Hwa (parallel 3a), E. Wang (parallel 3c) • 3D jet tomography • Adil (parallel 3a) • Incorporate dynamic evolution of bulk matter

  27. Summary • Discovery of Jet Quenching at RHIC proves that a interacting dense matter is formed: Opaque to jets • Dense matter at RHIC is 30 times higher than cold nuclei, energy density is 100 times higher • Jet tomography a useful and power tool for studying properties of dense matter • Heavy quarks, dihadron correlation, angular distribution, flavor dependence … • Soft hadron correlation  Cherenkov radiation dielectric property of the QGP at RHIC

  28. Back-up I

  29. Jet Quenching Tomography Df

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