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QCD equation of state for heavy ion collisions

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In this work,we calculate the equation of state (EoS) of quark gluon-plasma (QGP) using the CornwallJackiw-Tomboulis (CJT) effective action.We get the quark propagator by using the rank-1 separable model within the framework of the Dyson-Schwinger equations (DSEs).The results from CJT effective action are compared with lattice QCD data.We find that,when μ is small,our results generally fit the lattice QCD data when T ＞ Tc,but show deviations at and below Tc.It can be concluded that the EoS of CJT is reliable when T ＞ Tc.Then,by adopting the hydrodynamic code UVH2+1,we compare the CJT results of the multiplicity and elliptic flow v2 with the PHENIX data and the results from the original EoS in UVH2+1.While the CJT results of multiplicities generally match the original UVH2+1 results and fit the experimental data,the CJT results of v2 are slightly larger than the original UVH2+1 results for centralities smaller than 40％ and smaller than the original UVH2+1 results for higher centralities.

heavy ion collisionsequation of statemultiplicityelliptic flowCJT effective action

A-Meng Zhao、Yuan-Mei Shi、Jian-Feng Li、Hong-Shi Zong

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Department of Foundation, Southeast University Chengxian College, Nanjing 210088, China

Department of Physics and Electronic Engineering, Nanjing Xiaozhuang University, Nanjing 211171, China

Department of Physics, Nanjing University, Nanjing 210093, China

College of Mathematics and Physics, Nantong University, Nantong 226019, China

Joint Center for Particle, Nuclear Physics and Cosmology, Nanjing 210093, China

State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, CAS, Beijing 100190, China

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Supported by National Natural Science Foundation of ChinaSupported by National Natural Science Foundation of ChinaSupported by National Natural Science Foundation of ChinaSupported by National Natural Science Foundation of ChinaFundamental Research Funds for the Central UniversitiesJiangsu Planned Projects for Postdoctoral Research FundsNatural Science Foundation of Jiangsu ProvinceNatural Science Foundation of Jiangsu Province

114471211147508511535005116900300204143800741501035BBK20130078BK20130387

2017

10.1088/1674-1137/41/10/103101

中国物理C(英文版)
中国物理学会　中国科学院高能物理研究所　中国科学院近代物理研究所

中国物理C(英文版)

CSTPCDCSCDSCI
影响因子：0.347
ISSN：1674-1137
年,卷(期)：2017.41(10)
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