Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2006-06-12
Nucl.Phys. B754 (2006) 351-369
Physics
Nuclear Physics
Nuclear Theory
15 pages, 2 figures, typos corrected, a figure replaced. The version to be appeared in Nucl.Phys. B
Scientific paper
10.1016/j.nuclphysb.2006.08.021
We clarify general properties of the energy gap regarding its functional dependence on the energy-momentum dictated by the invariance under a space inversion or a time reversal. Then we derive perturbatively the equation of the imaginary part of the gap function for dense QCD in weak coupling and generalize our results from 2SC case to CFL case. We confirm that the imaginary part is down by $g$ relative to the real part in weak coupling. The numerical results show that, up to the leading order, the imaginary part is no larger than one MeV at extremely large densities and can be as large as several MeV the densities are of physical interest.
Feng Bo
Hou De-fu
Li Jia-rong
Ren Hai-cang
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