NJL-model description of Goldstone boson condensation in the color-flavor locked phase
NJL-model description of Goldstone boson condensation in the color-flavor locked phase
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DOI：
10.1016/j.physletb.2005.01.027
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发表时间：
2004-10
影响因子：
4.4
通讯作者：
M. Buballa
中科院分区：
文献类型：
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作者：
M. Buballa
采用示意性 NJL 型模型来研究色味锁定 (CFL) 相中解禁夸克物质中的 kaon 和 pion 凝聚，明确指的是夸克自由度。为此，除了构成 CFL 相的标量双夸克凝聚态之外，我们还允许存在非消失的赝标量双夸克凝聚态。通过适当选择颜色化学势来确保颜色中性。人们发现戈德斯通凝聚相中的自由能对夸克质量和电荷化学势的依赖性与有效拉格朗日方法中获得的预测具有良好的定性（在大多数情况下也是定量）一致。
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.