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arXiv 2501.07089nucl-exhep-ex
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高重子密度下的奇异强子产生

Strange Hadron Production at High Baryon Density

Central China Normal University(华中师范大学);University of Chinese Academy of Sciences(中国科学院大学)

Hongcan Li

AI总结:

本研究利用STAR束流能量扫描第二阶段固定靶实验数据,测量了不同能量金+金碰撞中多种奇异强子的产生特性,为研究高重子密度核物质性质提供了实验依据。

摘要:

奇异强子被认为是探测重离子碰撞中产生的核物质性质的灵敏探针。在数GeV碰撞能量下,由于重子阻止效应,形成的介质富含重子。本会议论文集介绍了STAR束流能量扫描第二阶段项目采用固定靶模式,在质心系能量$\u200bs_{\rm{NN}}\u200b$ = 3.2、3.5、3.9和4.5 GeV的金+金碰撞中获得的奇异强子产生的最新结果。展示了奇异强子($\rm{K}^0_S$、$\u200bΛ$、$\u200bΞ^-$)的横动量谱、快度密度分布、激发函数及中心度依赖关系。将这些结果与更高碰撞能量下的结果进行了比较,并通过与输运模型计算结果对比,讨论了相关物理意义。

英文摘要:

Strange hadrons have been suggested as sensitive probes of the properties of the nuclear matter created in heavy-ion collisions. At few-GeV collision energies, the formed medium is baryon-rich due to baryon stopping effect. In these proceedings, the recent results on strange hadron production in Au+Au collisions at $\sqrt{s_{\rm{NN}}}$ = 3.2, 3.5, 3.9 and 4.5 GeV with the fixed-target mode from the STAR Beam Energy Scan phase-II program are presented. The transverse momentum spectra, rapidity density distributions, excitation function and centrality dependence of strange hadrons ($\rm{K}^0_S,~Λ, ~Ξ^-$) are shown. These results are compared with those from higher collision energies and physics implications are discussed by comparing to the transport model calculations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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