首页|Critical Opalescence and Its Impact on the Jet Quenching Parameter (q)

Critical Opalescence and Its Impact on the Jet Quenching Parameter (q)

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Jet quenching parameter (q) 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 (q) at finite chemical potentials,in which (q) 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 (q) 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.

武警、曹杉杉、李峰

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School of Physical Science and Technology,Lanzhou University,Lanzhou 730000,China

Institute of Frontier and Interdisciplinary Science,Shandong University,Qingdao 266237,China

Research Center for Hadron and CSR Physics,Lanzhou University and Institute of Modern Physics of CAS,Lanzhou 730000,China

Lanzhou Center for Theoretical Physics,Key Laboratory of Theoretical Physics of Gansu Province,and Frontiers Science Center for Rare Isotopes,Lanzhou University,Lanzhou 730000,China

Frontiers Science Center for Rare Isotopes,Lanzhou University,Lanzhou 730000,China

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国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金

12105129121751222021-86712247101

2024

10.1088/0256-307X/41/3/031202

中国物理快报(英文版)
中国科学院物理研究所,中国物理学会

中国物理快报(英文版)

CSTPCDEI
影响因子：0.515
ISSN：0256-307X
年,卷(期)：2024.41(3)
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