The Hubble Constant in Heavy Ion Collisions

IF 0.6 4区物理与天体物理 Q4 PHYSICS, PARTICLES & FIELDS

Physics of Particles and Nuclei Pub Date : 2024-08-18 DOI:10.1134/S1063779624700242

V. Voronyuk, E. E. Kolomeitsev, N. V. Kolomoyets, O. V. Teryaev, N. S. Tsegelnik

引用次数: 0

Abstract

Preliminary results on determination of the microscopic Hubble constant for pions and nucleons in Au + Au collisions at \(\sqrt {{{s}_{{NN}}}} = 7.8\) GeV for a range of times and \(b = 7.5\) fm are presented and discussed. The data are simulated within PHSD model. A typically used method based on the fit of the velocity profile is considered in detail. Also a new method for determination of the Hubble parameter is proposed. It consists in the analysis of the statistical distribution of the divergence of the velocity field and getting the Hubble parameter as a position of a particular peak of the distribution. A comparison of the methods is done.

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重离子碰撞中的哈勃常数

摘要介绍并讨论了在Au + Au对撞中，在\(\sqrt {{{s}_{{NN}}}} = 7.8\) GeV的一系列时间和\(b = 7.5\) fm下，确定质子和核子的微观哈勃常数的初步结果。数据是在 PHSD 模型中模拟的。详细考虑了一种基于速度剖面拟合的常用方法。此外，还提出了一种确定哈勃参数的新方法。它包括对速度场发散的统计分布进行分析，并根据分布中特定峰值的位置得到哈勃参数。对这些方法进行了比较。

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

Physics of Particles and Nuclei 物理-物理：粒子与场物理

CiteScore

1.00

自引率

0.00%

发文量

116

审稿时长

6-12 weeks

期刊介绍： The journal Fizika Elementarnykh Chastits i Atomnogo Yadr of the Joint Institute for Nuclear Research (JINR, Dubna) was founded by Academician N.N. Bogolyubov in August 1969. The Editors-in-chief of the journal were Academician N.N. Bogolyubov (1970–1992) and Academician A.M. Baldin (1992–2001). Its English translation, Physics of Particles and Nuclei, appears simultaneously with the original Russian-language edition. Published by leading physicists from the JINR member states, as well as by scientists from other countries, review articles in this journal examine problems of elementary particle physics, nuclear physics, condensed matter physics, experimental data processing, accelerators and related instrumentation ecology and radiology.