NJL-model description of Goldstone boson condensation in the color-flavor locked phase

被引：39
作者：
Buballa, M [1 ]
机构：
[1] TU Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany
来源：
PHYSICS LETTERS B | 2005年 / 609卷 / 1-2期
关键词：
QCD phase transitions; color superconductivity; color-flavor locking; chiral symmetry; Goldstone bosons; Pion and kaon condensation;
D O I：
10.1016/j.physletb.2005.01.027
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A schematic NJL-type model is employed to investigate kaon and pion condensation in deconfined quark matter in the color-flavor locked (CFL) phase, explicitly referring to quark degrees of freedom. To that end we allow for non-vanishing pseudoscalar diquark condensates in addition to the scalar ones which constitute the CFL phase. Color neutrality is ensured by the appropriate choice of color chemical potentials. The dependence of the free energy in the Goldstone condensed phases on quark masses and charge chemical potentials is found to be in good qualitative-in most cases also quantitative-agreement with the predictions obtained within the effective Lagrangian approach. (C) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：57 / 67
页数：11
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