Constraints on hadron resonance gas interactions via first-principles Lattice QCD susceptibilities
Constraints on hadron resonance gas interactions via first-principles Lattice QCD susceptibilities
复制标题
通过第一原理晶格 QCD 磁化率对强子共振气体相互作用的约束
DOI：
10.1051/epjconf/202327603014
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发表时间：
2023
影响因子：
--
通讯作者：
Vovchenko, Volodymyr
中科院分区：
文献类型：
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作者：
Karthein, Jamie M.;Koch, Volker;Ratti, Claudia;Vovchenko, Volodymyr
通过引入吸引和排斥相互作用，我们研究了强子共振气体(HRG)模型在理想情况下的扩展。当考虑其他状态超过粒子数据组以高置信度测量的状态时，会对HRG模型中的总体压力进行有吸引力的修正。另一方面，我们还应用了排除体积修正，通过打开排斥(反)重子-(反)重子相互作用来确保没有重子重叠。我们强调这两个扩展的互补性，并确定守恒电荷极化率的组合，使我们能够分别限制它们。特别是，我们发现了对一种修正敏感而对另一种修正不敏感的有趣的易感比率。这使我们可以分别限制排除的体积和粒子光谱效果。对现有晶格结果的分析表明，在重子陌生区存在附加态和排斥重子相互作用，并指出超子具有比非奇异重子更小的排斥核心。我们注意到，这些结果对于大型强子对撞机和RHIC的重离子碰撞系统都很有趣。
We investigate extensions of the Hadron Resonance Gas (HRG) Model beyond the ideal case by incorporating both attractive and repulsive interactions into the model. When considering additional states exceeding those measured with high confidence by the Particle Data Group, attractive corrections to the overall pressure in the HRG model are imposed. On the other hand, we also apply excluded-volume corrections, which ensure there is no overlap of baryons by turning on repulsive (anti)baryon-(anti)baryon interactions. We emphasize the complementary nature of these two extensions and identify combinations of conserved charge susceptibilities that allow us to constrain them separately. In particular, we find interesting ratios of susceptibilities that are sensitive to one correction and not the other. This allows us to constrain the excluded volume and particle spectrum effects separately. Analysis of the available lattice results suggests the presence of both the extra states in the baryonstrangeness sector and the repulsive baryonic interaction, with indications that hyperons have a smaller repulsive core than non-strange baryons. We note that these results are interesting for heavy-ion-collision systems at both the LHC and RHIC.