Phase structure, collective modes, and the axial anomaly in dense QCD
Phase structure, collective modes, and the axial anomaly in dense QCD
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DOI：
10.1103/physrevd.76.074001
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发表时间：
2007-04
影响因子：
5
通讯作者：
N. Yamamoto;M. Tachibana;T. Hatsuda;G. Baym
中科院分区：
文献类型：
--
作者：
N. Yamamoto;M. Tachibana;T. Hatsuda;G. Baym
利用广义Ginzburg-Landau有效拉格朗日量，研究了具有手性凝聚和双夸克凝聚的稠密QCD的拓扑结构和低位集体模，对于两种和三种无质量味。正如我们之前发现的，QCD轴反常作用于彩色超导体中的手征凝聚体，当出现一个新的临界点时，它会导致手征对称性破缺和彩色超导相的交叉。在同时存在手征凝聚体和双夸克凝聚体的中等密度下，我们导出了赝标量玻色子的质量与手征凝聚体和双夸克凝聚体的量级之间的广义Gell-Mann-Okes-Renner关系。我们明确地证明了低密度下的普通介子与高密度下的广义介子的连续性。
Using a general Ginzburg-Landau effective Lagrangian, we study the topological structure and low-lying collective modes of dense QCD having both chiral and diquark condensates, for two and three massless flavors. As we found earlier, the QCD axial anomaly acts as an external field applied to the chiral condensate in a color superconductor and, as a new critical point emerges, leads to a crossover between the broken chiral symmetry and color superconducting phases. At intermediate densities where both chiral and diquark condensates are present, we derive a generalized Gell-Mann-Oakes-Renner relation between the masses of pseudoscalar bosons and the magnitude of the chiral and diquark condensates. We show explicitly the continuity of the ordinary pion at low densities to a generalized pion at high densities.