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1 Xin-Nian Wang Central China Normal University / Lawrence Berkeley National Lab 31 st Winter Workshop on Nuclear Dynamics Keystone Resort, Colorado, Jan.

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Presentation on theme: "1 Xin-Nian Wang Central China Normal University / Lawrence Berkeley National Lab 31 st Winter Workshop on Nuclear Dynamics Keystone Resort, Colorado, Jan."— Presentation transcript:

1 1 Xin-Nian Wang Central China Normal University / Lawrence Berkeley National Lab 31 st Winter Workshop on Nuclear Dynamics Keystone Resort, Colorado, Jan. 25-31 2015 Jet transport parameters from jet quenching at RHIC and LHC

2 Jets in heavy-ion collisions 2 q q Jet 1 Jet 2 A-A collision Multiple scattering Transverse momentum broadening Parton energy loss Jet suppression

3 Jet Quenching at RHIC & LHC Pedestal&flow subtracted STAR Preliminary

4 Jet Quenching at RHIC & LHC 4

5 Properties of QGP Space-time profile: EOS: Bulk transport: EM response: Jet transport: … 5

6 6 Deeply Inelastic Scattering k=xp p Quark distribution in collinear factorized pQCD parton model : quarks carrying momentum fraction x of the nucleon (nucleus)

7 TMD parton distribution in DIS Belitsky, Ji and Yuan (2002) k p....

8 Parton scattering in medium Jet transport operator due to color Lorentz force Liang, XNW & Zhou （ 2008 ） p.... k

9 p T broadening and jet transport DIS: HERMES Cold nuclear matter: Consistent with value from jet quenching in DIS: Deng & XNW, PRC83(2010)024902; Chang, Deng & XNW, PRC89(2014) 034911 See talk by H. Xing

10 Radiative energy loss and modified FF 10

11 11 Jet quenching in DIS of large nuclei Deng & XNW ( 2010)

12 12 Parton E-loss in Drell-Yan in pA Collisions Xing, Guo, E. Wang & XNW (2012) Modified initial beam parton distribution functions

13 13 13 Energy loss vs Shadowing (FNAL-E906 ELab = 120 GeV) FNAL-E906 will provide unambiguous measurement of initial state energy loss Parton E-loss in Drell-Yan in pA Collisions Xing, Guo, E. Wang & XNW (2012)

14 Medium-induced flavor conversion 14.... At large x B, struck quarks are u and d Chang, Deng & XNW arXiv:1411.7007

15 Hard and soft probes 15 Pb-Pb pp reference soft probeshard probes

16 JET Collaboration 16 http://jet.lbl.gov M. Gyulassy (Columbia Univ) P. Romatschke (Univ of Colorado) S. Bass, B. Mueller (Duke Univ) M. Strickland (Kent State Univ) X.-N. Wang (LBNL) R. Vogt (LLNL) I. Vitev (LANL) C. Gale, S. Jeon (McGill Univ) U. Heinz (Ohio State Univ) D. Molnar (Purdue Univ) R. Fries, C. Ko (Texas A & M Univ) A. Majumder (Wayne State Univ)

17 Jet quenching phenomenology 17 3+1D hydro +Jet transport +Hadronization A general framework for numerical implementation of different approaches & improvement of jet transport Hadronization: fragmentation & recombination Realistic bulk evolutions: e-by-e 3(2)+1 hydro : constrained by bulk hadron spectra, v n, http://jet.lbl.gov iEBE: E-by-E viscous hydro- generating bulk medium on-demand First JET package: viscous hydro+ semi-analytic jet quenching: CUJET, McGill-AMY, MARTINI-AMY, HT-BW, HT-M (will expand to other models)

18 Parton energy loss in Medium.... k ( BDMPS’96) Arnold, Moor, Yaffe (AMY’01): DS eqs. McGill-AMY: coupled rate equations Guo & XNW’00, Zhang,Wang, XNW’03 High-twist approach: Modified frag. Func. McGill-AMY, MARTINI-AMY, CUJET, HT-BW, HT-M, JEWEL, JaYEM, PCM, BAMPS …. Gyulassy-Levai-Vitev (GLV’00): Opacity expansion

19 Jet quenching phenomenology 19 McGill-AMY HT-BW HT-M

20 Jet quenching phenomenology 20

21 Jet transport coefficient RHIC LHC JET Collaboration: PRC 90 (2014) 014909 arXiv:1312.5003

22 Jet transport coefficient Future: dihadron, gamma-hadron, flavor dependence, jet observables RHIC BES and LHC higher energy JET Collaboration: PRC 90 (2014) 014909 arXiv:1312.5003

23 NLO and factorization Uncertainty in scale dependence of collinear LO results Medium properties & hard scattering factorizable? 23 Complete cancellation of soft-collinear divergence Complete factorization of the collinear divergence Talk by H. Xing Casalderrey-Solana & XNW (2007) Blaizot and Mehta-Tani arXiv:1106.1106

24 Jet-induced shock waves Re-distribution of lost jet energy Soft-parton –medium interaction non- perturbative in nature Closely related to bulk transport properties in medium and EoS 24 LBT simulations Jet-induced medium excitation in turn will influence the jet structure (both frag. func. and profile)

25 Broadening of  -hadron correlation 25 Li, Liu, Ma, XNW and Zhu, PRL 106 （ 2010 ） 012301 Ma and XNW, PRL 106 (2011) 162301  -hadron from AMPT calculation  -jet from LBT Jet azimuthal angle broadening is smaller but still finite XNW and Zhu, PRL 111 (2014) 062301

26 Summary 26 Bluhm, Kampfer & Redlich 2010 Majumder, Muller & XNW (2007) AdS/CFT First step towards quantitative extraction of qhat from combined jet quenching at RHIC and LHC Future: mapping out energy and T-dependence at RHIC & LHC

27 27

28 Backup 28

29 Jet transport coefficient JET Collaboration: arXiv:1312.5003

30 Linear Boltzmann jet transport Li, Liu, Ma, XNW and Zhu, PRL 106 （ 2010 ） 012301 XNW and Zhu, PRL 111 (2013) 062301 Induced radiation

31 31 Jet-induced medium excitation Jet propagation in a uniform medium

32 Effect of recoils and jet broadening 32 XNW and Zhu, PRL 111 (2014) 062301 Li, Liu, Ma, XNW and Zhu （ 2010 ） Ma and XNW (2011) Talk by: Tan Luo (Wed.),

33 Broadening of jet transv. profile 33 R=0.3

34 Medium mod. of frag function 34 Energy of reconstructed jet dominated by leading particle Suppression of fragmentation functions relative to initial energy XNW and Zhu, PRL 111(2013)062301 Seen in CMS & ATLAS single jets XNW, Huang & Sarcevic (1996)

35 35 Factorization at twist-4 T-4 LO T-4 NLO Finite contribution from asymmetric-cut diagrams  Transverse momentum square weighted cross section

36 36  Evolution equation for T4 - NEW soft-soft hard-hard & soft-hard & hard-soft When, there is no phase space for the gluon radiation from the initial gluon.

37 Running coupling in jet quenching 37 2013

38 Jet quenching phenomenology 38 McGill-AMY HT-BW HT-M

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