Role of Vector Interaction and Axial Anomaly in the PNJL Modeling of the QCD Phase Diagram
Role of Vector Interaction and Axial Anomaly in the PNJL Modeling of the QCD Phase Diagram
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DOI：
10.1016/j.physletb.2013.01.003
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发表时间：
2012-04
影响因子：
4.4
通讯作者：
N. M. Bratovic;T. Hatsuda;W. Weise
中科院分区：
文献类型：
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作者：
N. M. Bratovic;T. Hatsuda;W. Weise
利用改进的一致截断方案，结合轴向U（1）破缺的Kobayashi-Maskawa-Al-Hooft相互作用，研究了Polyakov-Nambu-Jona-Lasinio（PNJL）模型中味单重态矢量相互作用的影响.我们确认，在中等重子化学势的一阶手征相变及其临界点，没有矢量耦合的NJL型模型的一个通用功能，消失足够大的矢量耦合强度gv。本文给出了T-μ平面上相交边界曲率在μ=0附近及其与gv的关系的新结果。
Effects of a flavor singlet vector interaction in the Polyakov–Nambu–Jona-Lasinio (PNJL) Model are studied in combination with the axial U(1) breaking Kobayashi–Maskawa–ʼt Hooft interaction, using an improved, consistent cutoff scheme. We confirm that the first-order chiral phase transition at moderate baryon chemical potentials and its critical point, a generic feature of NJL-type models without vector coupling, disappear for sufficiently large vector coupling strength gv. New results are presented concerning the curvature of the crossover boundary in the T–μ plane close to μ=0 and its dependence on gv.