Response of quark condensate to the chemical potential
Response of quark condensate to the chemical potential
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DOI：
10.1103/physrevd.78.014005
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发表时间：
2002-10
影响因子：
5
通讯作者：
O. Miyamura;S. Choe;Y. Liu;T. Takaishi;A. Nakamura
中科院分区：
文献类型：
--
作者：
O. Miyamura;S. Choe;Y. Liu;T. Takaishi;A. Nakamura
本文提出了一种计算夸克凝聚体对化学势响应的新方法。基于[H. S.宗湖，澳-地昌角，澳-地Y.侯，W. M. Sun和Y. X. Liu，Phys.Rev.C71，015205（2005）.]并采用[R.阿尔克塞特湾代特莫尔德角S. Fischer和P. Maris，Phys.Rev.D70，014014（2004）.] [M. S. Bhagwat，M. A. Pichowsky和P.C. Tandy，Phys.Rev.D67，054019（2003）.]，解析计算了有限化学势[{mu}]下的夸克凝聚。得到的[{mu}]的表达式是真实的，这与以往文献中的结果不同。此外，还发现当化学势μ小于临界值时，[μ]与真空值保持不变。并将夸克凝聚的这种行为与文献报道的结果进行了比较。
In this paper we propose a new method for calculating the response of the quark condensate to the chemical potential. Based on the method of calculating the dressed-quark propagator at finite chemical potential in the framework of the rainbow-ladder approximation of the Dyson-Schwinger approach proposed in [H. S. Zong, L. Chang, F. Y. Hou, W. M. Sun, and Y. X. Liu, Phys. Rev. C 71, 015205 (2005).] and adopting the meromorphic form of the quark propagator given in [R. Alkofer, W. Detmold, C. S. Fischer, and P. Maris, Phys. Rev. D 70, 014014 (2004).][M. S. Bhagwat, M. A. Pichowsky, and P. C. Tandy, Phys. Rev. D 67, 054019 (2003).], the quark condensate at finite chemical potential [{mu}] is calculated analytically. The obtained expression for [{mu}] is real, which is different from the results in the previous literature. In addition, it is found that when the chemical potential {mu} is less than a critical one [{mu}] is kept unchanged from its vacuum value. A comparison is made between this behavior of the quark condensate and those reported in the previous literatures.