On a Signature of Phase Transition in Heavy Ion Nuclear Matter

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/s1063779624700850

M. Tokarev, I. Zborovský

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Abstract

Some results of data analysis of hadron production in \(p + p\) and \(A + A\) collisions obtained in the framework of \(z\)-scaling are discussed. A possible signature of phase transition in the matter created in central \({\text{Au}} + {\text{Au}}\) collisions in the scaling regime is observed. The concept of the \(z\)-scaling is based on the principles of self-similarity, locality and fractality of particle interactions at a constituent level. The self-similarity variable \(z\) and the scaling function \(\psi (z)\) are expressed via the experimentally measurable quantities and some model parameters characterizing the structure of colliding objects, fragmentation process and specific heat of the produced medium. The irregularities of fractal entropy and specific heat parameter \({{c}_{{{\text{AuAu}}}}}\) observed in \(K_{S}^{0}\)-meson production in \({\text{Au}} + {\text{Au}}\) collisions at RHIC are considered as an indication of phase transition in nuclear matter.

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关于重离子核物质中的相变特征

摘要讨论了在\(z\)尺度框架下获得的\(p + p\) 和\(A + A\) 碰撞中强子产生的数据分析的一些结果。在中央\({text{Au}} + {\text{Au}}\)对撞中产生的物质在缩放机制下可能存在相变的特征。(\(z\)-缩放)的概念是基于粒子相互作用在成分层面上的自相似性、局部性和碎裂性原理。自相似性变量（\(z\)）和缩放函数（\psi (z)\）是通过实验可测量的量和一些模型参数来表示的，这些参数表征了碰撞物体的结构、碎裂过程和所产生介质的比热。在RHIC的\({\text{Au}} + {\text{Au}}\)碰撞中观察到的\(K_{S}^{0}\)-介子产生的分形熵和比热参数\({{c}_{text{AuAu}}}}}}\)的不规则性被认为是核物质相变的一种迹象。

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.

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