Cutoff-independent regularization of four-fermion interactions for color superconductivity
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2006-01-01
Autores
Farias, R. L.S. [UNESP]
Dallabona, G. [UNESP]
Krein, G. [UNESP]
Battistel, O. A.
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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 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. © 2006 The American Physical Society.
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Physical Review C - Nuclear Physics, v. 73, n. 1, 2006.