QCD phase diagram with the improved Polyakov loop effective potential

Shao, Guo-yun; Gao, Xue-yan; Tang, Z.; Gao, Ning

doi:10.1007/s41365-016-0152-0

Cited by 4 publications

(1 citation statement)

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“…The end point of the first-order phase boundary toward the crossover region is called the QCD critical end point (CEP) [4,[13][14][15]. Many efforts have been made by both the experimental and theoretical communities to find the location of the CEP [13,[16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. The fluctuations of conserved charges have been proposed as a promising observable to probe the CEP [31][32][33], because they are very sensitive to the diverged correlation length [31,32,[34][35][36][37][38] and directly related to the susceptibilities in the lattice QCD calculations [7,33,39].…”

Section: Introductionmentioning

confidence: 99%

Probing fluctuations and correlations of strangeness by net-kaon cumulants in Au+Au collisions at $\sqrt{s_{NN}} = 7.7$ GeV

Chen¹,

Wang²,

Ma³

2022

Preprint

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We calculate the cumulants and correlation functions of net-kaon multiplicity distributions in Au+Au collisions at √ sNN = 7.7 GeV using a multiphase transport model (AMPT) with both a new coalescence mechanism and all charge conservation laws. The AMPT model can basically describe the centrality dependences of the net-kaon cumulants and cumulant ratios measured by the STAR experiment. By focusing on the stage evolution of the cumulants, cumulant ratios, and correlation functions, we reveal several key effects on the fluctuations and correlations of strangeness during the dynamical evolution of relativistic heavy-ion collisions, including strangeness production and diffusion, hadronization, hadronic rescatterings, and weak decays. Without considering the QCD critical fluctuations, we demonstrate that the net-kaon fluctuations can largely represent the net-strangeness fluctuations. Our results provide a baseline for understanding the net-kaon and net-strangeness fluctuations, which help to search for the possible critical behaviors at the critical end point in relativistic heavy-ion collisions.(2,1) 2 and κ(1,2) 2 , which may be caused by the production of two pairs of ss in the string fragmentation.

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