The breaking of SU(6) symmetry to a more general flavor SU(3) symmetry could serve as a potential explanation for the “hyperon puzzle” of neutron stars by adjusting the hyperon potentials. Specifically, when the soft relativistic mean-field (RMF) Λ hyperon potentials fall within the domains of chiral SU(3) interactions NLO13 with two-body forces, the maximum mass of neutron stars is expected to be lower than 2.0 , whereas it can exceed if the RMF Λ hyperon potentials are sufficiently stiff to be consistent with those from chiral SU(3) interactions NLO13 with three-body forces. In our investigation involving these two types of Λ hyperon potentials, we explore how the hyperon yields and flows are affected in heavy-ion collisions. We find that the inclusion of hyperon potentials results in better agreement of the Λ directed flows with data but without clear differentiation in the stiffness of the hyperon potentials. Similarly negligent is the disparity in the rapidity distributions of the Λ collective flows predicted by the stiff and soft hyperon potentials. In contrast, the Λ collective flows beyond the central rapidity region turn out to be sensitive to the stiffness of the RMF equation of state (EOS) with the preference of a soft RMF EOS to a stiff one. Notably, the transverse momentum distributions of Λ hyperon production are sensitive to both the stiffness of the RMF EOS and Λ hyperon potential at high transverse momenta.

中文翻译：

---

中子星和重离子碰撞中超子势刚度与超子成分的相关性


通过调整超子势，SU(6) 对称性破缺为更一般的 SU(3) 对称性可以作为中子星“超子之谜”的潜在解释。具体来说，当软相对论平均场（RMF）Λ超子势落在具有二体力的手性SU（3）相互作用NLO13范围内时，中子星的最大质量预计低于2.0，而它可以如果 RMF Λ 超子势足够坚硬以与来自三体力的手性 SU(3) 相互作用 NLO13 的势相一致，则超过。在我们涉及这两种类型的 Λ 超子势的研究中，我们探索了重离子碰撞中超子产量和流动如何受到影响。我们发现，包含超子势可以使 Λ 定向流与数据更好地吻合，但超子势的刚度没有明显的差异。同样忽视的是由硬超子势和软超子势预测的 Λ 集体流的速度分布的差异。相比之下，超出中心快速度区域的 Λ 集体流结果对 RMF 状态方程 (EOS) 的刚度敏感，并且优先选择软 RMF EOS 而不是刚性 RMF EOS。值得注意的是，Λ 超子产生的横向动量分布对 RMF EOS 的刚度和高横向动量下的 Λ 超子势敏感。