Aspects of the Color Flavor Locking phase of QCD in the Nambu-Jona Lasinio approximation
Abstract
We study two aspects of the CFL phase of QCD in the NJL approximation. The first one is the issue of the dependence on μ of the ultraviolet cutoff in the gap equation, which is solved allowing a running coupling constant. The second one is the dependence of the gap on the strange quark mass; using the high density effective theory we perform an expansion in the parameter (ms/μ)2 after checking that its numerical validity is very good already at first order.
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