Simultaneous Chiral Symmetry Restoration and Deconfinement Consequences for the QCD Phase Diagram
Simultaneous Chiral Symmetry Restoration and Deconfinement Consequences for the QCD Phase Diagram
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DOI：
10.3847/1538-4357/836/1/89
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发表时间：
2016-03
期刊：
影响因子：
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通讯作者：
T. Klähn;T. Fischer;M. Hempel
中科院分区：
文献类型：
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作者：
T. Klähn;T. Fischer;M. Hempel
对于天体物理场景中夸克物质的研究，通常采用热力学袋模型。虽然成功，但它没有解释由于矢量相互作用导致的动力学手性对称破缺和排斥，这对于解释最近对两个太阳质量的大质量中子星的观测至关重要。在 Klähn & Fischer 中，我们开发了新颖的 vBag 夸克物质模型，该模型考虑了这些效应。本文将 vBag 扩展到有限温度和同位旋不对称性。 vBag 的另一个特殊功能是根据给定的强子状态方程确定解约束袋常数，以确保手性和解约束跃迁一致。我们讨论了这种新方法对相变结构、相图的影响，以及对中子星的影响。
For studies of quark matter in astrophysical scenarios, the thermodynamic bag model is commonly employed. Although successful, it does not account for dynamical chiral symmetry breaking and repulsions due to the vector interaction which is crucial to explain recent observations of massive, two solar mass neutron stars. In Klähn & Fischer we developed the novel vBag quark matter model which takes these effects into account. This article extends vBag to finite temperatures and isospin asymmetry. Another particular feature of vBag is the determination of the deconfinement bag constant from a given hadronic equation of state in order to ensure that chiral and deconfinement transitions coincide. We discuss consequences of this novel approach for the phase transition construction, the phase diagram, and implications for protoneutron stars.