Determination of U(1)A restoration from pion and a0-meson screening masses: Toward the chiral regime
Determination of U(1)A restoration from pion and a0-meson screening masses: Toward the chiral regime
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从 π 介子和 a0-介子筛选质量确定 U(1)A 还原：走向手性状态
DOI：
10.1103/physrevd.93.016002
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Masanobu Yahiro
中科院分区：
文献类型：
--
作者：
Masahiro Ishii;Koji Yonemura;Junichi Takahashi;Hiroaki Kouno;Masanobu Yahiro
我们通过在Kobayashi-Maskawa - ' t Hooft决定相互作用中引入温度依赖的强度，有效地恢复了风味纠缠polyakkov -loop扩展nambujna - lasinio （EPNJL）模型的对称性。通过改进的p4交错费米子晶格QCD （LQCD）模拟得到的介子和介子筛选质量，很好地确定了这种依赖关系。在手性跃迁赝临界温度附近，强度被强烈抑制。带阱的EPNJL模型再现了用畴壁费米子LQCD计算的介子磁化率。模型表明，在轻夸克质量为零、奇夸克质量固定于物理值的“轻夸克手性极限”点，手性跃迁为二阶跃迁。这表明存在一个临界点。因此，位置是估计的。
We incorporate the effective restoration ofsymmetry in the-flavor entanglement Polyakov-loop extended Nambu–Jona-Lasinio (EPNJL) model by introducing a temperature-dependent strengthto the Kobayashi–Maskawa–’t Hooft determinant interaction.dependence ofis well determined from pion and-meson screening masses obtained by lattice QCD (LQCD) simulations with improved p4 staggered fermions. The strength is strongly suppressed in the vicinity of the pseudocritical temperature of chiral transition. The EPNJL model with thewell reproduces meson susceptibilities calculated by LQCD with domain-wall fermions. The model shows that the chiral transition is second order at the “light-quark chiral-limit” point where the light quark mass is zero and the strange quark mass is fixed at the physical value. This indicates that there exists a tricritical point. Hence, the location is estimated.