Cutoff-independent regularization of four-fermion interactions for color superconductivity

Details Cutoff-independent regularization of four-fermion interactions for color superconductivity Cutoff-independent regularization of four-fermion interactions for color superconductivity

2005-10-11

arxiv.org/abs/hep-ph/0510145v2

Phys.Rev. C73 (2006) 018201

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 1 eps figure - Revised manuscript to match the published paper

Scientific paper

10.1103/PhysRevC.73.018201

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 \sim \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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