Susceptibilities and critical exponents within the Nambu–Jona-Lasinio model
Susceptibilities and critical exponents within the Nambu–Jona-Lasinio model
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DOI：
10.1142/s0217751x15501997
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发表时间：
2015-06
影响因子：
1.6
通讯作者：
Yi-Lun Du;Ya Lu;Shu-Sheng Xu;Zhu-Fang Cui;Chao Shi;H. Zong
中科院分区：
文献类型：
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作者：
Yi-Lun Du;Ya Lu;Shu-Sheng Xu;Zhu-Fang Cui;Chao Shi;H. Zong
在（2 + 1）味Nambu-Jona-Lasinio模型的平均场近似下，严格推导出有限温度和夸克化学势下手征极化率、夸克数极化率等的几组耦合方程。在SU（2）和SU（3）情形下，分别给出了在QCD临界端点（CEP）附近的临界指数。结果发现，这些不同的磁化率共享几乎相同的临界行为附近的CEP。序参量的临界指数和理论预测之间的比较也包括在内。
In the mean field approximation of (2 + 1)-flavor Nambu–Jona-Lasinio model, we strictly derive several sets of coupled equations for the chiral susceptibility, the quark number susceptibility, etc. at finite temperature and quark chemical potential. The critical exponents of these susceptibilities in the vicinity of the QCD critical end point (CEP) are presented in SU(2) and SU(3) cases, respectively. It is found that these various susceptibilities share almost the same critical behavior near the CEP. The comparisons between the critical exponents for the order parameters and the theoretical predictions are also included.