Study of baryon number transport dynamics and strangeness conservation effects using $$\Omega$$ -hadron correlations

IF 3.6 1区 物理与天体物理 Q1 NUCLEAR SCIENCE & TECHNOLOGY Nuclear Science and Techniques Pub Date : 2024-07-11 DOI:10.1007/s41365-024-01464-8
Wei-Jie Dong, Xiao-Zhou Yu, Si-Yuan Ping, Xia-Tong Wu, Gang Wang, Huan-Zhong Huang, Zi-Wei Lin
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Abstract

In nuclear collisions at RHIC energies, an excess of \(\Omega\) hyperons over \(\bar{\Omega }\) is observed, indicating that \(\Omega\) has a net baryon number despite s and \(\bar{s}\) quarks being produced in pairs. The baryon number in \(\Omega\) may have been transported from the incident nuclei and/or produced in the baryon-pair production of \(\Omega\) with other types of anti-hyperons such as \(\bar{\Xi }\). To investigate these two scenarios, we propose to measure the correlations between \(\Omega\) and K and between \(\Omega\) and anti-hyperons. We use two versions, the default and string-melting, of a multiphase transport (AMPT) model to illustrate the method for measuring the correlation and to demonstrate the general shape of the correlation. We present the \(\Omega\)-hadron correlations from simulated Au+Au collisions at \(\sqrt{s_\text{NN}} = 7.7\) and \(14.6 \ \textrm{GeV}\) and discuss the dependence on the collision energy and on the hadronization scheme in these two AMPT versions. These correlations can be used to explore the mechanism of baryon number transport and the effects of baryon number and strangeness conservation on nuclear collisions.

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利用 $$\Omega$$ - 中子相关性研究重子数输运动力学和奇异守恒效应
在RHIC能量下的核碰撞中,观察到了(\ω\)超子超过(\bar{\ω }\)超子的情况,这表明尽管s和(\bar{s}\)夸克是成对产生的,但(\ω\)超子具有净重子数。(\ω\)中的重子数可能是从入射核中传输过来的,和/或在\(\ω\)与其他类型的反高子(如\(\bar{\Xi }\)的重子对产生过程中产生的。为了研究这两种情况,我们提议测量\(\Omega\)和K之间以及\(\Omega\)和反超子之间的相关性。我们使用多相输运(AMPT)模型的两个版本(默认版本和弦熔化版本)来说明测量相关性的方法,并展示相关性的一般形状。我们展示了在(\sqrt{s_text{NN}} = 7.7\)和(14.6\textrm{GeV}\)条件下模拟的Au+Au碰撞的\(\Omega\)-强子相关性,并讨论了这两个AMPT版本对碰撞能量和强子化方案的依赖性。这些相关关系可用于探索重子数输运机制以及重子数和陌生化守恒对核对撞的影响。
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来源期刊
Nuclear Science and Techniques
Nuclear Science and Techniques 物理-核科学技术
CiteScore
5.10
自引率
39.30%
发文量
141
审稿时长
5 months
期刊介绍: Nuclear Science and Techniques (NST) reports scientific findings, technical advances and important results in the fields of nuclear science and techniques. The aim of this periodical is to stimulate cross-fertilization of knowledge among scientists and engineers working in the fields of nuclear research. Scope covers the following subjects: • Synchrotron radiation applications, beamline technology; • Accelerator, ray technology and applications; • Nuclear chemistry, radiochemistry, radiopharmaceuticals, nuclear medicine; • Nuclear electronics and instrumentation; • Nuclear physics and interdisciplinary research; • Nuclear energy science and engineering.
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