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

• Autor(a) principal: Farias, R. L.S. [UNESP]
• Data de Publicação: 2006
• Outros Autores: Dallabona, G. [UNESP], Krein, G. [UNESP], Battistel, O. A.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1103/PhysRevC.73.018201; http://hdl.handle.net/11449/224714

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.