Several problems in determining the QCD phase boundary by relativistic heavy ion collisions

Yuanfang WU; Xiaobing LI; Lizhu CHEN; Zhiming LI; Mingmei XU; Xue PAN; Fan ZHANG; Yanhua ZHANG; Yuming ZHONG

doi:10.11889/j.0253-3219.2023.hjs.46.040006

Journals >NUCLEAR TECHNIQUES >Volume 46 >Issue 4 >Page 040006 > Article

NUCLEAR TECHNIQUES
Vol. 46, Issue 4, 040006 (2023)

Several problems in determining the QCD phase boundary by relativistic heavy ion collisions

Yuanfang WU^1、*, Xiaobing LI¹, Lizhu CHEN², Zhiming LI¹, Mingmei XU¹, Xue PAN³, Fan ZHANG⁴, Yanhua ZHANG⁵, and Yuming ZHONG¹

Author Affiliations

¹Institution of Particle Physics, Central China Normal University, Wuhan 430079, China

²School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China

³School of Electronic Engineering, Chengdu Technological University, Chengdu 611730, China

⁴Wuhan Optical Valley Future School, Wuhan 430078, China

⁵Department of Physics and Electronic Engineering, Yuncheng University, Yuncheng 044000, China

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DOI: 10.11889/j.0253-3219.2023.hjs.46.040006 Cite this Article

Yuanfang WU, Xiaobing LI, Lizhu CHEN, Zhiming LI, Mingmei XU, Xue PAN, Fan ZHANG, Yanhua ZHANG, Yuming ZHONG. Several problems in determining the QCD phase boundary by relativistic heavy ion collisions[J]. NUCLEAR TECHNIQUES, 2023, 46(4): 040006 Copy Citation Text

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Statistics dependence of κσ2 of net-proton (a) and net-charge (b) multiplicity distributions calculated by the CBWC method at various centrality bin width

Fig. 1. Statistics dependence of

κ σ^{2}

of net-proton (a) and net-charge (b) multiplicity distributions calculated by the CBWC method at various centrality bin width

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The centrality dependency of κσ2 of original (a) and mixed (b) samples, dynamical (c) and formula corrected (d) for three values of efficiency 100%, 80% and 60%

Fig. 2. The centrality dependency of

κ σ^{2}

of original (a) and mixed (b) samples, dynamical (c) and formula corrected (d) for three values of efficiency 100%, 80% and 60%

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Fig. 3.

χ_{2}

vs.

T / T_{p t}

at h= 0.000 5 (a), 0.000 775 (b), 0.002 (c) with the system sizes of L = 40, 50, 60, 70

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Fig. 4. The scaled order parameter

m L^{λ / ν}

vs. the scaled variable

t L^{1 / ν}

(a, c) and T (b, d)(a, b) 2D Ising model with external field h=0, (c, d) 3D three-state Potts model with h=0.000 5

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Fig. 5. Contour plot of

D (T, a)

for three different external fields (a) h = 0.000 775, (b) h = 0.000 5, (c) h = 0.002

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Fig. 6. The evolution of |m| with time at L = 60 for random initial configuration at temperatures T/T_c = 0.93 (a), 0.99 (b), 1.00 (c) and 1.03 (d), respectively

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Fig. 7. Average relaxation time as a function of temperature (a) System sizes L = 50 and 60 starting from random initial configuration, (b) Random initial configurations and polarized initial configurations at a fixed system size L=60

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Fig. 8. The time evolution of cumulants of |m| at a given system size L=60 at T/T_c=0.99 (a~d) and 1.01 (e~h)

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