1 Transport description of viscous effects Che-Ming Ko Texas A&M University  Introduction  A multi-phase transport (AMPT) model  Anisotropic flow -

Slides:

Advertisements

Similar presentations

PID v2 and v4 from Au+Au Collisions at √sNN = 200 GeV at RHIC

Advertisements

Zi-Wei Lin (ECU) 28th WWND, Puerto Rico April 10, Update of Initial Conditions in A Multiple Phase Transport (AMPT) Model Zi-Wei Lin Department.

Marcus Bleicher, Berkeley, Oct Elliptic Flow in High Energetic Nuclear Collisions Marcus Bleicher & Xianglei Zhu FIAS & Institut für Theoretische.

1 Jet Structure of Baryons and Mesons in Nuclear Collisions l Why jets in nuclear collisions? l Initial state l What happens in the nuclear medium? l.

Recombination for JET Shower MC: Status and Discussion Rainer Fries Texas A&M University JET NLO & MC Meeting Wayne State University, August 23, 2013 On.

Anisotropic Flow at RHIC Jiayun Chen (for Collaboration) Institute of Particle Physics, HZNU, Wuhan, , P.R.China Brookhaven National Lab, Upton,

Aug , 2005, XXXV ISMD, Czech X.Dong, USTC 1 Open charm production at RHIC Xin Dong University of Science and Technology of China - USTC  Introduction.

Heavy Quark Probes of QCD Matter at RHIC Huan Zhong Huang University of California at Los Angeles ICHEP-2004 Beijing, 2004.

1 Heavy Ion Collisions at LHC in a Multiphase Transport Model  A multi-phase transport (AMPT) model  Rapidity and transverse momentum distributions 

Forward-Backward Correlations in Relativistic Heavy Ion Collisions Aaron Swindell, Morehouse College REU 2006: Cyclotron Institute, Texas A&M University.

Forward-Backward Correlations in Heavy Ion Collisions Aaron Swindell, Morehouse College REU Cyclotron 2006, Texas A&M University Advisor: Dr. Che-Ming.

1 Isotropization of an equilibrating Quark-Gluon Plasma Bin Zhang a, Lie-Wen Chen b, Che-Ming Ko c a Arkansas State University, b Shanghai Jiaotong University,

Elliptic Flow and Constituent Quark Scaling

Collective Flow Effects and Energy Loss in ultrarelativistic Heavy Ion Collisions Zhe Xu USTC, Hefei, July 11, 2008 with A. El, O. Fochler, C. Greiner.

Relativistic Heavy Ion Collisions and Hot Dense Matter

K/π and p/π Fluctuations 25 th Winter Workshop on Nuclear Dynamics February 2, 2009 Gary Westfall Michigan State University For the STAR Collaboration.

Space time evolution of QCD matter Parton cascade with stochastic algorithm Transport rates and momentum isotropization Thermalization of gluons due to.

1 Searching for the QGP at RHIC Che-Ming Ko Texas A&M University  Signatures of QGP  Quark coalescence Baryon/meson ratio Hadron elliptic flows and quark.

XXXIII International Symposium on Multiparticle Dynamics, September 7, 2003 Kraków, Poland Manuel Calderón de la Barca Sánchez STAR Collaboration Review.

High p T identified hadron anisotropic flow and Deuteron production in 200 GeV Au+Au Collisions Shengli Huang Vanderbilt University for the PHENIX Collaboration.

High p T identified charged hadron v 2 and v 4 in 200GeV AuAu collisions by the PHENIX experiment Shengli Huang Vanderbilt University for the PHENIX Collaboration.

Strange and Charm Probes of Hadronization of Bulk Matter at RHIC International Symposium on Multi-Particle Dynamics Aug 9-15, 2005 Huan Zhong Huang University.

Steffen A. RHIC #1 Steffen A. Bass Duke University & RIKEN-BNL Research Center The Protons Puzzle at RHIC - the demise of pQCD? Recombination.

QM’05 Budapest, HungaryHiroshi Masui (Univ. of Tsukuba) 1 Anisotropic Flow in  s NN = 200 GeV Cu+Cu and Au+Au collisions at RHIC - PHENIX Hiroshi Masui.

Partonic Collectivity at RHIC ShuSu Shi for the STAR collaboration Lawrence Berkeley National Laboratory Central China Normal University.

Flow fluctuation and event plane correlation from E-by-E Hydrodynamics and Transport Model LongGang Pang 1, Victor Roy 1,, Guang-You Qin 1, & Xin-Nian.

Longitudinal de-correlation of anisotropic flow in Pb+Pb collisions Victor Roy ITP Goethe University Frankfurt In collaboration with L-G Pang, G-Y Qin,

Background introduction Model introduction Analysis method Results and discussions Conclusions Collaborators: S. Zhang, Y. G. Ma, H. Z. Huang, X. Z, Cai,

Aug. 4-9, 2005, QM2005, Budapest X.Dong, USTC 1 Open charm production at RHIC Xin Dong University of Science and Technology of China - USTC.

M. Oldenburg Strange Quark Matter 2006 — March 26–31, Los Angeles, California 1 Centrality Dependence of Azimuthal Anisotropy of Strange Hadrons in 200.

Anisotropic flow, Azimuthal Balance Function, and Two-charged-particle Azimuthal Correlations in RQMD and AMPT We are very grateful to Zhixu Liu and Jiaxin.

Background introduction Model introduction Analysis method Results and discussions Conclusions G.L. Ma, S. Zhang, YGM et al., Phys Lett B 641, 362 (2006)

Steffen A. BassDynamics of Hadronization #1 Steffen A. Bass Duke University & RIKEN-BNL Research Center The baryon puzzle at RHIC Recombination + Fragmentation.

Kang Seog Lee Chonnam National University, Korea Dynamical Recombination model of QGP Introduction – recombination model Dynamic recomination calculation.

Flow fluctuation and event plane correlation from E-by-E Hydrodynamics and Transport Model Victor Roy Central China Normal University, Wuhan, China Collaborators.

XXXI Max Born Symposium and HIC for FAIR Workshop, Wrocław June 15, 20131/31 Recent Developments of A Multi-Phase Transport Model Zi-Wei Lin Department.

Peter Kolb, November 18, 2003Momentum Anisotropies1 Momentum Anisotropies -- Probing the detailed Dynamics Department of Physics and Astronomy State University.

Zi-Wei LinCollective flow and QGP properties11/19/2003 ● Why x-t correlation may be important for HBT ● Origin of a large&positive x-t correlation: partonic?

Scaling of Elliptic Flow for a fluid at Finite Shear Viscosity V. Greco M. Colonna M. Di Toro G. Ferini From the Coulomb Barrier to the Quark-Gluon Plasma,

Elliptic flow and shear viscosity in a parton cascade approach G. Ferini INFN-LNS, Catania P. Castorina, M. Colonna, M. Di Toro, V. Greco.

1 June 24-29, Levoca, Slovakia Baryon-strangeness correlations in a partonic/hadron transport model F. Jin, Y. G. Ma, X. Z. Cai, G. L. Ma, H. Huang,

Olena Linnyk Charmonium in heavy ion collisions 16 July 2007.

Strange Probes of QCD Matter Huan Zhong Huang Department of Physics and Astronomy University of California Los Angeles, CA Oct 6-10, 2008; SQM2008.

24 Nov 2006 Kentaro MIKI University of Tsukuba “electron / photon flow” Elliptic flow measurement of direct photon in √s NN =200GeV Au+Au collisions at.

1 Charm production in relativistic heavy ion collisions Che-Ming Ko Texas A&M University  Charm flow and energy loss at RHIC  Charm production at LHC.

1 Che-Ming Ko Texas A&M University  QCD phase diagram  Signatures of QGP  Experimental observations at RHIC and theoretical interpretations  RHIC low.

Jin-Hui Chen Shanghai Institute of Applied Physics, CAS In collaboration with F. Jin, D. Gangadharan, X. Cai, H. Huang and Y. Ma Parton distributions at.

Charm elliptic flow at RHIC B. Zhang 1, L.W. Chen 2, C.M. Ko 3 1 Arkansas State University, 2 Shanghai Jiao Tong University, 3 Texas A&M University Charm.

Elliptic flow and incomplete equilibration in AMPT Jian-Li Liu Harbin Institute of Technology.

Elliptic Anisotropy v2 May Be Dominated by Particle Escape Zi-Wei Lin (with L He, T Edmonds, F Liu, D Molnar, FQ Wang) Quark Matter /17 Elliptic.

JET Collaboration Meeting June 17-18, 2014, UC-Davis1/25 Flow and “Temperature” of the Parton Phase from AMPT Zi-Wei Lin Department of Physics East Carolina.

V 2 and v 4 centrality, p t and particle-type dependence in Au+Au collisions at RHIC Yuting Bai for the STAR Collaboration.

Heavy Flavor Measurements at RHIC&LHC W. Xie (Purdue University, West Lafayette) W. Xie (Purdue University, West Lafayette) Open Heavy Flavor Workshop.

Shear Viscosity and Collective Flow in Heavy Ion Collisions within Parton Cascade Calculations Zhe Xu, Carsten Greiner Trento, Sept. 17, 2009 Institut.

Collectivity in a Parton Cascade Zhe Xu BNL, April 30, 2008 with A. El, O. Fochler, C. Greiner and H. Stöcker.

Production, energy loss and elliptic flow of heavy quarks at RHIC and LHC Jan Uphoff with O. Fochler, Z. Xu and C. Greiner Hard Probes 2010, Eilat October.

SQM2003March 13Zi-wei Lin The Ohio State University ● Why transport model? ● Space-time (x-t) correlation: its effect on R out/ R side Extract radii from.

SQM，UC Berkeley 27 June- 1July 2016

Heavy Quark Flow as Better Probes of QGP Properties

The puzzling relation between the RAA and the v2 for heavy mesons in a Boltzmann and in a Langevin approach F. Scardina, S.K. Das, S. Plumari, V.Greco.

Anisotropic flow at RHIC: How unique is the NCQ scaling ?

Heavy-Flavour Physics in Heavy-Ion Collisions

Fragmentation and Recombination for Exotics in Heavy Ion Collisions

Introduction Results Methods Conclusions

Charmed hadron signals of partonic medium

Institute of Particle Physics Huazhong Normal University

Effect of equilibrium phase transition on multiphase transport in relativistic heavy ion collisions 喻梅凌华中师范大学粒子物理研究所 2019/2/24 第十届全国粒子物理大会桂林.

Production of Multi-Strange Hyperons at FAIR Energies.

Hiroshi Masui for the PHENIX collaboration August 5, 2005

Hadronization of a QGP via recombination

Presentation transcript:

1 Transport description of viscous effects Che-Ming Ko Texas A&M University  Introduction  A multi-phase transport (AMPT) model  Anisotropic flow - Elliptic flow - Higher-order anisotropic flow - Rapidity dependence - System size dependence - Flavor dependence  Summary Collaborators: Lie-wen Chen (SJTU), Zie-wei Lin (Univ. Alabama), Bin Zhang (Arkansas State Univ.)

2 Zhang, Gyulassy & Ko, PLB 455, 45 (1999) Elliptic flow from parton cascade Based on Zhang’s parton cascade (ZPC) (CPC 109, 193 (1998)) using minijet partons from HIJING for 200 AGeV and b=7.5fm v 2 of partons is sensitive to their scattering cross section

3  Using α s =0.5 and screening mass μ=gT≈0.6 GeV at T≈0.25 GeV, then 1/2 ≈4.2T≈1 GeV, and pQCD gives σ≈2.5 mb and a transport cross section  σ=6 mb → μ≈0.44 GeV, σ t ≈2.7 mb  σ=10 mb → μ≈0.35 GeV, σ t ≈3.6 mb Zhang’s parton cascade (ZPC) Bin Zhang, Comp. Phys. Comm. 109, 193 (1998)

4 A multiphase transport (AMPT) model Default: Lin, Pal, Zhang, Li &Ko, PRC 61, (00); 64, (01); 72, (05);  Initial conditions: HIJING (soft strings and hard minijets)  Parton evolution: ZPC  Hadronization: Lund string model for default AMPT  Hadronic scattering: ART  Convert hadrons from string fragmentation into quarks and antiquarks  Evolve quarks and antiquarks in ZPC  When partons stop interacting, combine nearest quark and antiquark to meson, and nearest three quarks to baryon (coordinate-space coalescence)  Hadron flavors are determined by quarks’ invariant mass String melting: PRC 65, (02); PRL 89, (02)

5  Based on coordinate-space coalescence  Need string melting and large parton scattering cross section  Mass ordering of v 2 at low p T as in ideal hydrodynamic model Lin & Ko, PRC 65, (2002) Elliptic flow from AMPT σ p = 6 mb

6 Coalescence model Quark distribution function Spin-color statistical factor e.g. Coalescence probability function PRL 90, (2003); PRC 68, (2003) Number of hadrons with n quarks and/or antiquarks For baryons, Jacobi coordinates for three-body system are used.

7 Momentum-space coalescence model Including 4 th order quark flow Meson flow Baryon flow Kolb, Chen, Greco, & Ko, PRC 69 (2004)

8 Data can be described by a multiphase transport (AMPT) model Data Parton cascade Higher-order anisotropic flow Momentum-space coalescence Chen, Ko, & Lin, PRC 69, (04)

9 Strange quarks from AMPT Chen & Ko, PRC 73, (2006)

10 Phi & Omega flows same for phi & Omega but different from quark instead of 1.1 and 0.7 from dynamical coalescence model Chen & Ko, PRC 73, (2006)

11 satisfied for large phi and Omega sizes of 4.5 fm Flows of phi & Omega with large sizes

12 Pseudorapidity dependence of v 1 and v 2  String melting describes data near mid-rapidity (|  |<1.5)  At large rapidity (|  |>3), hadronic picture works better Chen, Greco, Ko & Koch, PLB 605, 95 (2005)

13 System size dependence of elliptic flow Chen & Ko, nucl-th/ v 2 is proportional to size of colliding system

14 Elliptic flow in collisions of asymmetric systems Compared to symmetric collisions  Directed flow v 1 is stronger  Elliptic flow v 2 is more sensitive to parton cross section  Both directed and elliptic flows are asymmetric in forward and backward rapidities

15 Quark elliptic flow from AMPT  P T dependence of charm quark v 2 is different from that of light quarks.  At high p T, charm quark has similar v 2 as light quarks.  Charm elliptic flow is also sensitive to parton cross sections

16 Charm elliptic flow from AMPT Zhang, Chen & Ko, PRC 72, (05)  Current light quark masses are used in AMPT. Charmed meson elliptic flow will be larger if constituent quark masses are used.  To increase v 2 at low p t requires going beyond parton cascade

17 Summary  Elliptic flow is sensitive to parton scattering cross section  The AMPT model with string melting can reproduce observed large elliptic flow and mass ordering at low p T with large parton cross section ( quasi bound states in QGP and/or multiparton dynamics gg↔ggg?)  Observed hadron v 4 ≈1.2v 2 2 is reproduced with parton v 4 ≈v 2 2  v 1 and v 2 at midrapidity requires formation of partonic matter, while those at large rapidity is consistent with a hadronic matter  AMPT predicts: - v 2 scales with the size of colliding system - Stronger v 1 and more sensitivity of v 2 to parton cross section in asymmetric than symmetric collisions, and both show forward-backward asymmetry in rapidity  Observed large charmed meson flow requires large charm quark scattering cross section (resonance effect?)