Cutoff-independent regularization of four-fermion interactions for color superconductivity
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American Physical Soc
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We implement a cutoff-independent regularization of four-fermion interactions to calculate the color-superconducting gap parameter in quark matter. The traditional cutoff regularization has difficulties for chemical potentials mu of the order of the cutoff Lambda, predicting in particular a vanishing gap at mu similar to Lambda. The proposed cutoff-independent regularization predicts a finite gap at high densities and indicates a smooth matching with the weak coupling QCD prediction for the gap at asymptotically high densities.
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Physical Review C. College Pk: American Physical Soc, v. 73, n. 1, 4 p., 2006.
