Phase diagram of strongly interacting matter in the improved PNJL model

TANG Zhan-duo; SHAO Guo-yun

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Phase diagram of strongly interacting matter in the improved PNJL model

TANG Zhan-duo,SHAO Guo-yun * #

Colledge of Science, Xi\'an Jiaotong University, Xi\'an 710049

*Correspondence author

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Funding: Natural Science Basic Research Plan in Shaanxi Province of China （No.2014JQ1012）, Specialized Research Fund for the Doctoral Program of Higher Education（No.20130201120046）, National Natural Science Foundation of China（No.11305121）

Opened online: 1 June 2017

Accepted by: none

Citation: TANG Zhan-duo,SHAO Guo-yun.Phase diagram of strongly interacting matter in the improved PNJL model[OL]. [ 1 June 2017] http://en.paper.edu.cn/en_releasepaper/content/4735961

Both the chemical potential modification on the Polyakov effectivepotential and the entanglement interactions between the Polyakov-loop and chiral condensate are considered to improved the Polyakov-Nambu-Jona-Lasinio model (PNJL model), which is named the $mu$EPNJL model. Compared with the standard PNJL model, the calculation shows that the range of chiral symmetry phase transition is greatly enlarged in the modified model. The chiral symmetry restoration and deconfinement coincide in a wide range in the $T-mu$ phase diagram, and the critical end point moves towards a smaller chemical potential and higher temperature. Besides, the measurement of the moments of net-proton multiplicity distributions at Relativistic hints that some critical behaviors possibly exists, which also provides a constraint on the relevant model parameters.

Keywords:Intermediate and high energy nuclear physics; strong interaction; chiral symmetry restoration; deconfinement; critical end point

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