BCS-BEC crossover in dense relativistic matter: Collective excitations

被引：31
|
作者：
Brauner, Tomas [1 ]
机构：
[1] Goethe Univ Frankfurt, Inst Theoret Phys, D-60438 Frankfurt, Germany
来源：
PHYSICAL REVIEW D | 2008年 / 77卷 / 09期
关键词：
D O I：
10.1103/PhysRevD.77.096006
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the relativistic BCS-BEC crossover within a class of Nambu-Jona-Lasinio type models, including arbitrary Lorentz-scalar pairing channels. Using the mean-field approximation we investigate spectral properties of the collective bosonic excitations in the superfluid phase, with particular attention to the Nambu-Goldstone bosons of the broken symmetry. This is a first step towards a systematic improvement of the mean-field approximation by including the fluctuation effects. The general results are illustrated on pairing in dense two-flavor quark matter-the two-flavor color superconductor.
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页数：11
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