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Resolving the hyper-triton yield description puzzle in high energy nuclear collisions
The European Physical Journal A ( IF 2.7 ) Pub Date : 2021-02-24 , DOI: 10.1140/epja/s10050-021-00370-6
O. V. Vitiuk , K. A. Bugaev , E. S. Zherebtsova , D. B. Blaschke , L. V. Bravina , E. E. Zabrodin , G. M. Zinovjev

The recently developed hadron resonance gas model with multicomponent hard-core repulsion is used to address and resolve the long standing problem to describe the light nuclear cluster multiplicities including the hyper-triton measured by the STAR Collaboration, known as the hyper-triton chemical freeze-out puzzle. An improved description for the hadronic and light nuclear cluster data measured by STAR at the collision energy \(\sqrt{s_{NN}} =200\) GeV and by ALICE at \(\sqrt{s_{NN}} =2.76\) TeV is obtained. This is achieved by applying a new strategy of analyzing the light nuclear cluster data and by using the value for the hard-core radius of the (anti-)\(\varLambda \) hyperons found in earlier work. One of the most striking results of the present work is that for the most probable scenario of chemical freeze-out for the STAR energy the obtained parameters allow to simultaneously reproduce the values of the experimental ratios \(S_3\) and \({\overline{S}}_3\) which were not included in the fit.



中文翻译:

解决高能核碰撞中的超-子产量描述难题

最近开发的具有多组分硬核排斥力的强子共振气体模型用于解决并解决长期存在的问题,以描述轻核簇的多重性,包括通过STAR协作测量的超-子,即超hyper子化学冻结-出拼图。对STAR在碰撞能量\(\ sqrt {s_ {NN}} = 200 \) GeV和ALICE在\(\ sqrt {s_ {NN}} = 2.76 \下测得的强子和轻核簇数据的改进描述。 )获得TeV。这是通过应用一种分析轻核簇数据的新策略并使用(anti-)\(\ varLambda \)的硬核半径值来实现的在早期工作中发现的超子。当前工作最惊人的结果之一是,对于最可能发生的STAR能量化学冻结的情况,所获得的参数允许同时再现实验比率\(S_3 \)\({\ overline {S}} _ 3 \)未包含在拟合中。

更新日期:2021-02-24
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