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arXiv 0707.0632hep-phnucl-th
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中等密度色味锁定相中的赝标Goldstone玻色子

Pseudoscalar Goldstone bosons in the color-flavor locked phase at moderate densities

Verena Kleinhaus, Michael Buballa, Dominik Nickel, Micaela Oertel

摘要:

本文在Nambu-Jona-Lasinio型模型中研究了中等密度下赝标Goldstone玻色子在色香味锁相中的性质。在无规相位近似下,通过求解夸克-夸克散射的Bethe-Salpeter方程,构造了Goldstone玻色子。我们的主要研究重点是(i)手征极限下的弱衰变常数,(ii)夸克质量相等时味(伪)Goldstone玻色子的质量,(iii)夸克质量不等时味(伪)Goldstone玻色子的质量和有效化学势,以及(iv)K介子凝聚的开始.我们比较我们的结果与预测的低能有效场论。详细讨论了弱耦合极限下所得结果的偏差。

英文摘要:

The properties of the pseudoscalar Goldstone bosons in the color-flavor locked phase at moderate densities are studied within a model of the Nambu--Jona-Lasinio type. The Goldstone bosons are constructed explicitly by solving the Bethe-Salpeter equation for quark-quark scattering in random phase approximation. Main focus of our investigations are (i) the weak decay constant in the chiral limit, (ii) the masses of the flavored (pseudo-) Goldstone bosons for non-zero but equal quark masses, (iii) their masses and effective chemical potentials for non-equal quark masses, and (iv) the onset of kaon condensation. We compare our results with the predictions of the low-energy effective field theory. The deviations from results obtained in the weak-coupling limit are discussed in detail.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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