QCD phase diagram at finite baryon and isospin chemical potentials in the Polyakov loop extended quark meson model with vector interaction
QCD phase diagram at finite baryon and isospin chemical potentials in the Polyakov loop extended quark meson model with vector interaction
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DOI：
10.1103/physrevd.88.074006
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发表时间：
2013-04
影响因子：
5
通讯作者：
H. Ueda;T. Nakano;A. Ohnishi;M. Ruggieri;K. Sumiyoshi
中科院分区：
文献类型：
--
作者：
H. Ueda;T. Nakano;A. Ohnishi;M. Ruggieri;K. Sumiyoshi
本文利用具有矢量相互作用的Polyakov圈扩展夸克介子（PQM）模型研究了同位旋非对称物质的QCD相图。发现临界点温度在同位旋不对称物质中降低，在大的同位旋化学势下消失。我们还讨论了中子星星核的QCD相变。通过比较PQM中的QCD相图与相对论平均场模型中中子星星物质的重子化学势和同位旋化学势，我们发现中子星星核中的手征相变可能由于大的同位旋化学势而发生阶数交叉.
We investigate the QCD phase diagram of isospin asymmetric matter using the Polyakov loop extended quark meson (PQM) model with vector interaction. The critical point temperature is found to decrease in isospin asymmetric matter and disappear at large isospin chemical potential. We also discuss the QCD phase transition in the neutron star core. From comparison of the QCD phase diagram in PQM and corresponding baryon and isospin chemical potentials of neutron star matter in relativistic mean field models, we show that the order of the chiral phase transition in the neutron star core could be crossover because of large isospin chemical potential.