Journal
NUCLEAR PHYSICS B
Volume 754, Issue 3, Pages 351-369Publisher
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DOI: 10.1016/j.nuclphysb.2006.08.021
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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 perturbltively 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 for the densities of physical interest. (c) 2006 Elsevier B.V. All rights reserved.
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