Cutoff-independent regularization of four-fermion interactions for color superconductivity
R. L. S. Farias, G. Dallabona, G. Krein, O. A. Battistel
DOI 10.1103/PhysRevC.73.018201 · Physical Review C
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Abstract
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 μ of the order of the cutoff Λ, predicting in particular a vanishing gap at μ~Λ. 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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