Strangeness neutrality and baryon-strangeness correlations
Strangeness neutrality and baryon-strangeness correlations
复制标题
奇异性中性和重子奇异性相关性
DOI：
10.1103/physrevd.100.111501
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发表时间：
2019
影响因子：
5
通讯作者：
Fabian Rennecke
中科院分区：
文献类型：
--
作者：
Wei-jie Fu;Jan M. Pawlowski;Fabian Rennecke
我们推导出了奇异数中性与重子 - 奇异数关联之间的一种简单关系。在重离子碰撞中，前者是强相互作用中夸克数守恒的结果，而后者是量子色动力学（QCD）物质特性的灵敏探测手段。这种关系使我们能够从奇异数中性时的奇异数化学势直接提取重子 - 奇异数关联。明确的计算是在有限温度和密度下具有2 + 1种动力学夸克味的量子色动力学低能理论框架内进行的。在泛函重整化群理论中考虑了非微扰的夸克和强子涨落。结果表明重子 - 奇异数关联对量子色动力学相变具有显著的敏感性，以及奇异数中性对这一可观测物理量所起的关键作用。
We derive a simple relation between strangeness neutrality and baryon-strangeness correlations. In heavy-ion collisions, the former is a consequence of quark number conservation of the strong interactions while the latter are sensitive probes of the character of QCD matter. This relation allows us to directly extract baryon-strangeness correlations from the strangeness chemical potential at strangeness neutrality. The explicit calculations are performed within a low-energy theory of QCD with 2 þ 1 dynamical quark flavors at finite temperature and density. Nonperturbative quark and hadron fluctuations are taken into account within the functional renormalization group. The results show the pronounced sensitivity of baryon-strangeness correlations on the QCD phase transition and the crucial role that strangeness neutrality plays for this observable.