Wei-Jie Dong, Xiao-Zhou Yu, Si-Yuan Ping, Xia-Tong Wu, Gang Wang, Huan-Zhong Huang, Zi-Wei Lin
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引用次数: 0
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.
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.