Effects of a phase transition on two-pion interferometry in heavy ion collisions at √sNN=2.4-7.7 GeV

被引：0

作者：

Li, Pengcheng ^{[1
,2
,3
]}

Steinheimer, Jan ^{[4
]}

Reichert, Tom ^{[1
,6
]}

Kittiratpattana, Apiwit ^{[1
,7
]}

Bleicher, Marcus ^{[1
,5
,6
]}

Li, Qingfeng ^{[2
]}

机构：

[1] Goethe Univ Frankfurt, Inst Theoret Phys, D-60438 Frankfurt, Germany

[2] Huzhou Univ, Sch Sci, Huzhou 313000, Peoples R China

[3] Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China

[4] Frankfurt Inst Adv Studies, D-60438 Frankfurt, Germany

[5] GSI Helmholtzzentrum Schwerionenforschung, D-64291 Darmstadt, Germany

[6] GSI Helmholtz Ctr Heavy Ion Phys, Helmholtz Res Acad Hesse FAIR HFHF, Campus Frankfurt, D-60438 Frankfurt, Germany

[7] Suranaree Univ Technol, Ctr Excellence High Energy Phys & Astrophys, Sch Phys, Nakhon Ratchasima 30000, Thailand

来源：

SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY | 2023年 / 66卷 / 03期

基金：

中国国家自然科学基金;

关键词：

heavy ion collisions; HBT correlation; equation of state; EQUATION-OF-STATE; PION INTENSITY INTERFEROMETRY; QUANTUM CHROMODYNAMICS; AU COLLISIONS; PLUS; FLUCTUATIONS; DEPENDENCE; MODEL;

D O I：

10.1007/s11433-022-2041-8

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Hanbury-Brown-Twiss (HBT) correlations for charged pions in central Au+Au collisions at root sNN = 2.4-7.7 GeV (corresponding to beam kinetic energies in the fixed target frame from E-lab = 1.23 to 30 GeV/nucleon) are calculated using the ultra-relativistic quantum molecular dynamics model with different equations of state (EoSs). The effects of a phase transition at high baryon densities are clearly observed in the explored HBT parameters. The results show that the available data on the HBT radii, R-O/R-S and R-O(s) - R-S(2), in the investigated energy region favor a relatively stiff EoS at low beam energies, which then turns into a soft EoS at high collision energies consistent with astrophysical constraints on the high-density EoS of quantum chromodynamics (QCD). The specific effects of two different phase transition scenarios on R-O/R-S and R-O(s) - R-S(2) are investigated. A phase transition with a significant softening of the EoS below four times the nuclear saturation density can be excluded using HBT data. Our results highlight that the pion's R-O/R-S and R-O(s) - R-S(2) are sensitive to the stiffness of the EoS and can be used to constrain and understand the QCD EoS in a high baryon density region.

引用

页数：10

共 11 条

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[2] Effects of a phase transition on two-pion interferometry in heavy ion collisions at sNN=2.4−7.7GeV\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\sqrt {{s_{{\rm{NN}}}}} = 2.4 - 7.7\,\,{\rm{GeV}}$$\end{document}
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