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.

Slides:

Advertisements

Similar presentations

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.

Advertisements

Mass, Quark-number, Energy Dependence of v 2 and v 4 in Relativistic Nucleus- Nucleus Collisions Yan Lu University of Science and Technology of China Many.

Elliptic flow of thermal photons in Au+Au collisions at 200GeV QNP2009 Beijing, Sep , 2009 F.M. Liu Central China Normal University, China T. Hirano.

Supported by DOE 11/22/2011 QGP viscosity at RHIC and LHC energies 1 Huichao Song 宋慧超 Seminar at the Interdisciplinary Center for Theoretical Study, USTC.

Hard Photon Production in a Chemically Equilibrating QGP at Finite Baryon Density Zejun He Zejun He Shanghai Institute of Applied Physics Research Chinese.

Direct Photon Production in pp collisions at the LHC 第 8 届高能物理大会分会南昌 F.M. Liu IOPP/CCNU, Wuhan, China.

The Color Glass Condensate and RHIC Phenomenology Outstanding questions: What is the high energy limit of QCD? How do gluons and quarks arise in hadrons?

带电粒子多重数在 RHIC 对碰撞能量的依赖裴骅华中师范大学. Outline  STAR Detector  Beam Energy Scan  Nuclear Modification Factors (R CP )  Charged hadron R CP at STAR 

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

Motivation One of the major findings at the Relativistic Heavy Ion Collider (RHIC) is the suppression of the highly energetic particles which raises the.

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

Elementary Process and d+Au Collision at RHIC 大阪大学 RCNP, 28 Oct., 2003 北大理一瀬昌嗣 (M.Isse) ☆共同研究原研東海研大塚直彦 (N.Otuka) インド物理学研Ｐ．Ｋ．サフ (P.K.Sahu)

Quark recombination in high energy collisions for different energies Steven Rose Worcester Polytechnic Institute Mentor: Dr. Rainer Fries 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.

We distinguish two hadronization mechanisms:  Fragmentation Fragmentation builds on the idea of a single quark in the vacuum, it doesn’t consider many.

1 Statistical Model Analysis of K/  and p/  fluctuations in heavy-ion collisions 付菁华华中师范大学粒子物理研究所.

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,

1 相对论重离子碰撞中  介子的产生陈金辉中国科学院上海应用物理研究所 QCD 相变与重离子碰撞物理国际暨 2008 年 7 月 10 号 -12 号 Many thanks to: X. Cai, S. Blyth, F. Jin, H. Huang, G. Ma,

5-12 April 2008 Winter Workshop on Nuclear Dynamics STAR Particle production at RHIC Aneta Iordanova for the STAR collaboration.

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.

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

Statistical Models A.) Chemical equilibration (Braun-Munzinger, Stachel, Redlich, Tounsi) B.) Thermal equilibration (Schnedermann, Heinz) C.) Hydrodynamics.

Direct photon production in RHIC and LHC energies Xiao-Mei Li, Shou-Ping Li, Shou-Yang Hu, Ben-Hao Sa China Institute of Atomic Energy Dai-Mei Zhou, Zhi-Guang.

11/05/2009 唐泽波 (USTC), 第十三届全国中高能核物理大会, 合肥 1 Radial flow and non-equilibrium in heavy-ion collisions (from Tsallis-based Blast-Wave) Li Yi, Ming Shao, Zhangbu.

Direct photon production in pp and AA collisions 合肥, Dec 5 - 7, 2009 刘复明华中师范大学粒子物理研究所 FML, T.Hirano, K.Werner, Y. Zhu, Phys.Rev.C79:014905,2009. FML,

Dilepton production in HIC at RHIC Energy Haojie Xu( 徐浩洁 ) In collaboration with H. Chen, X. Dong, Q. Wang Hadron2011, WeiHai Haojie Xu( 徐浩洁 )

2010/4/18 1 南昌 Correlation between event multiplicity and observed collective flow 周代梅华中师范大学粒子物理研究所.

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,

Study the particle ratio fluctuations in heavy- ion collisions Limin Fan ( 樊利敏 ) Central China Normal University (CCNU) 1.

Luan Cheng (Institute of Particle Physics, Huazhong Normal University) I.Introduction II. Potential Model with Flow III.Flow Effects on Parton Energy Loss.

EXPERIMENTAL EVIDENCE FOR HADRONIC DECONFINEMENT In p-p Collisions at 1.8 TeV * L. Gutay - 1 * Phys. Lett. B528(2002)43-48 (FNAL, E-735 Collaboration Purdue,

Shear Viscosity and Viscous Entropy Production in Hot QGP at Finite Density 报告人：刘绘华中师范大学粒子所.

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

Does HBT interferometry probe thermalization? Clément Gombeaud, Tuomas Lappi and J-Y Ollitrault IPhT Saclay WPCF 2009, CERN, October 16, 2009.

Partial thermalization, a key ingredient of the HBT Puzzle Clément Gombeaud CEA/Saclay-CNRS Quark-Matter 09, April 09.

Dynamical equilibration of strongly- interacting ‘infinite’ parton matter Vitalii Ozvenchuk, in collaboration with E.Bratkovskaya, O.Linnyk, M.Gorenstein,

PHOTONS AND EVOLUTION OF A CHEMICALLY EQUILIBRATING AND EXPANDING QGP AT FINITE BARYON DENSITY Shanghai Institute of Applied Physics Jiali Long, Zejun.

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

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.

School of Collective Dynamics in High-Energy CollisionsLevente Molnar, Purdue University 1 Effect of resonance decays on the extracted kinetic freeze-out.

Olena Linnyk Charmonium in heavy ion collisions 16 July 2007.

The study on the early system just after Heavy Ion Collision Ghi R. Shin (with B. Mueller) Andong National University J.Phys G. 29, 2485/JKPS 43, 473 Korean-EU.

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.

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.

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.

Elliptic Flow and Jet Quenching at RHIC Ghi R. Shin Andong National University J.Phys G. 29, 2485/JKPS 43, 473 Him 2006 May Meeting.

24/6/2007 P.Ganoti, 1 Study of Λ(1520) production in pp TeV with the ALICE detector Paraskevi Ganoti University.

PACIAE model analysis of particle ratio fluctuations in heavy-ion collisions Limin Fan ( 樊利敏 ) Central China Normal University (CCNU) 1 第十五届全国核物理大会.

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

Comparisons between hydrodynamics and transport calculations Zhe Xu WPCF, Krakow, Sept. 11, 2008.

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.

Duke University 野中千穂 Hadron production in heavy ion collision: Fragmentation and recombination in Collaboration with R. J. Fries (Duke), B. Muller (Duke),

Heavy quarks and charmonium at RHIC and LHC within a partonic transport model Jan Uphoff with O. Fochler, Z. Xu and C. Greiner XLIX International Winter.

HBT results from a rescattering model Tom Humanic Ohio State University WPCF 2005 August 17, 2005.

Direct photon production in p + p and Au + Au collisions at = 200GeV Xiao-Mei Li, Shou-Ping Li, Shou-Yang Hu, Ben-Hao Sa China Institute of Atomic Energy.

Review of ALICE Experiments

Hydro + Cascade Model at RHIC

Johann Wolfgang Goethe-Universität Frankfurt

Fragmentation and Recombination for Exotics in Heavy Ion Collisions

Introduction Results Methods Conclusions

Institute of Particle Physics Huazhong Normal University

高能物理学会第七届全国会员代表大会暨学术年会

of Hadronization in Nuclei

Strong Magnetic Fields in HIC

Masahiro Konno (Univ. of Tsukuba) for the PHENIX　Collaboration Contact

Dipartimento Interateneo di Fisica, Bari (Italy)

QGP Formation Signals and Quark Recombination Model

Presentation transcript:

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

outline Introduction and motivation AMPT model and the time evolution Collective phase transition and its effect Conclusion

I. Introduction and motivation Stages of heavy ion collision and different theoretical approach

Basic ideas of Monte Carlo simulation about transport theory Transport theory describes the evolution of parton distribition in phase space transport equations are numerically solved by simulating the dynamical evolution of the parton distributions as a succession of binary parton-parton collisions The mechanics about thermalization and formation of QGP are studied in microscopic Necessity to combine transport model with phase transition In heavy ion simulation, when collective phenomenon emerge, transport isn’t enought Parton phase is in pQCD vacuum, while hadron phase is in physical vacuum

II. AMPT model and the time evolution Components of A MultiPhase Transport Model (AMPT v2.11) Z.W.Lin et al. PRC 72(2005)064901 Initial conditions: (x,p) distributions of minijet partons from hard process and strings from soft process ,strings are melted to be partons Partonic transport: only two-body elastic scatterings two partons collide if Hadronization: Hadron transport: AMPT v2.11 was successful in elliptic flow and HBT but failed to describe hadron rapidity and transverse momentum spectra AuAu collision at 200 AGeV, impact parameter b<3fm, parton cross section 10mb

Parton and hadron time evolution in AMPT v2.11 Parton formation time: When parton interaction cease, hadrons are produced one by one The percentage of parton and hadron varies with time: When t<5fm/c, parton dominate, system in deconfined phase When t>30fm/c, hadron dominate, system in confined phase Problems occur: 1) some partons have unreasonable long lifetime 2) deconfined partons exist in confined physical vacuum 3) parton-wise hadronization but no collective phase transition

III. Collective phase transition and its effect Extract temperature from particle spectrum Assume locally thermal equilibrium, in a thermal + transverse radial flow model, the transverse mass distribution is T: kinetic freezeout temperature, Lattice predicted critical temperature

Collective phase transition following a super-cooling stage To solve the problem of AMPT, we have a physical picture: 1)High temperature QGP expands and evaporates hadrons 2)The system supercools to a point (model parameter) lower than 3)A sudden phase transition turns all the left partons to hadrons at this point hadron phase parton phase The time evolution of parton and hadron temperature with phase transition at t=5fm/c

The effect of collective phase transition on final state distribution 1) hadron rapidity distribution AMPT with phase transition describes data better

2) Elliptic flow

Collective phase transition is necessary for transport model IV. Conclusion Unreasonable long lifetime of partons is found in transport model To solve the problem, a collective phase transition is added to the transport model AMPT to replace the parton-wise hadronization Better model and data agreement are achieved for the longitudinal distribution and elliptic flow Collective phase transition is necessary for transport model

II. AMPT model and the time evolution Components of A MultiPhase Transport Model (AMPT v2.11) Initial conditions: spatial and momentum distributions of minijet partons from hard process and strings from soft process ,strings are melted to be partons Partonic transport: only two-body elastic scatterings are considered with cross section . Two partons will undergo scattering when the closest distance between them is smaller than Hadronization: Hadron transport: AMPT v2.11 was successful in elliptic flow and HBT but failed to describe hadron rapidity and transverse momentum spectra

Basic ideas of Monte Carlo simulation about transport theory Semi-classically, parton density distribution in phase space can be described by Boltzman equation Boltzman equation are solved by simulating the interaction and evolution of partons in detail The mechanics about thermalization and formation of QGP are studied microscopic Necessity to combine transport model with phase transition In transport model, partons hadronize one by one with unreasonable long lifetime Parton phase is in pQCD vacuum, while hadron phase is in physical vacuum