Critical Opalescence and Its Impact on the Jet Quenching Parameter q^

IF 3.5 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Physics Letters Pub Date : 2024-04-01 DOI:10.1088/0256-307x/41/3/031202

Jing Wu, Shanshan Cao, Feng Li

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引用次数: 0

Abstract

Jet quenching parameter

is essential for characterizing the interaction strength between jet partons and nuclear matter. Based on the quark-meson model, we develop a new framework for calculating

at finite chemical potentials, in which

is related to the spectral function of the chiral order parameter. A mean field perturbative calculation up to the one-loop order indicates that the momentum broadening of jets is enhanced at both high temperature and high chemical potential, and approximately proportional to the parton number density in the partonic phase. We further investigate the behavior of

in the vicinity of the critical endpoint (CEP) by coupling our calculation with a recently developed equation of state that includes a CEP in the universality class of the Ising model, from which we discover the partonic critical opalescence, i.e., the divergence of scattering rate of jets and their momentum broadening at the CEP, contributed by scatterings via the σ exchange process. Hence, for the first time, jet quenching is connected with the search of CEP.

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临界光度及其对喷流淬火参数 q^ 的影响

射流淬火参数 q^ 对于描述射流粒子与核物质之间的相互作用强度至关重要。基于夸克-介子模型，我们建立了一个在有限化学势下计算 q^ 的新框架，其中 q^ 与手性阶参数的谱函数相关。达到一环阶的均场微扰计算表明，喷流的动量展宽在高温和高化学势下都会增强，并且与部分子相的部分子数密度近似成正比。我们进一步研究了q^在临界端点（CEP）附近的行为，将我们的计算与最近开发的状态方程耦合，其中包括伊辛模型普遍性类别中的CEP，由此我们发现了部分子临界开光，即在CEP处由通过σ交换过程的散射贡献的射流散射率及其动量展宽的发散。因此，这是第一次将射流淬火与 CEP 的搜索联系起来。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chinese Physics Letters 物理-物理：综合

CiteScore

5.90

自引率

8.60%

发文量

13238

审稿时长

4 months

期刊介绍： Chinese Physics Letters provides rapid publication of short reports and important research in all fields of physics and is published by the Chinese Physical Society and hosted online by IOP Publishing.

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