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PNJL model at zero temperature: The three-flavor case
Physical Review D ( IF 5 ) Pub Date : 2021-12-02 , DOI: 10.1103/physrevd.104.116001
O. A. Mattos , T. Frederico , C. H. Lenzi , M. Dutra , O. Lourenço

We propose a three-flavor version of the Polyakov-Nambu-Jona-Lasino (PNJL) model at zero temperature regime, by implementing a traced Polyakov loop (Φ) dependence in the scalar, vector and ’t Hooft channel strengths. We study the thermodynamics of this model, named as PNJL0, with special attention for the first-order confinement/deconfinement phase transition for which Φ is the order parameter. For the symmetric quark matter case, an interesting feature observed is a strong reduction of the constituent strange quark mass (Ms) at the chemical potential related to point where deconfinement takes place. The emergence of Φ favors the restoration of chiral symmetry even for the strange quark. We also investigate the charge neutral system of quarks and leptons in weak equilibrium. As an application, we construct a hadron-quark phase transition with a density dependent hadronic model coupled to the SU(3) PNJL0 model. In this case, the quark side is composed by deconfined particles. This approach is used to determine mass-radius profiles compatible with recent data from the Neutron Star Interior Composition Explorer mission.

中文翻译:

PNJL 零温模型:三种口味情况

我们提出了一种在零温度状态下的 Polyakov-Nambu-Jona-Lasino (PNJL) 模型的三种口味版本,通过实施跟踪 Polyakov 循环(Φ) 对标量、向量和 't Hooft 通道强度的依赖。我们研究了这个模型的热力学,命名为 PNJL0,特别关注一阶限制/解除限制相变,其中Φ是订单参数。对于对称夸克物质的情况,观察到的一个有趣的特征是组成奇夸克质量的强烈减少() 在与解除限制发生点相关的化学势。的出现Φ即使对于奇怪的夸克,也有利于恢复手征对称性。我们还研究了处于弱平衡状态的夸克和轻子的电荷中性系统。作为一个应用,我们使用耦合到 SU(3) PNJL0 模型的密度相关强子模型构建了一个强子-夸克相变。在这种情况下,夸克侧由去约束的粒子组成。这种方法用于确定与来自中子星内部成分探测器任务的最新数据兼容的质量半径剖面。
更新日期:2021-12-02
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