22-27 March 2015
Hotel do Bosque
Brazil/East timezone

Subtractive regularization of the NJL model

Not scheduled
3h 30m
Hotel do Bosque

Hotel do Bosque

Rodovia Mário Covas (Rio-Santos) BR - 101 Sul, Km 533, Angra dos Reis, RJ, Brazil
Poster Field theoretical approaches to QCD


Prof. Varese Salvador Timóteo (UNICAMP)


The NJL model is an effective model for the strong interaction, which is one of the four fundamental forces in nature [1]. Despite the simplicity of the model, it gives a very good description of some fundamental properties of the underlying theory of quantum chromodynamics, like the dynamical chiral symmetry breaking and its corresponding effective mass generation [2, 3]. Here we propose to use another approach to make the gap equation finite but keeping the momentum integration up to infinity. The alternative approach is based on a subtractive renormalization method and has been applied to the nuclear force with great success [4]. [1] Y. Nambu and G. Jona-Lasinio, Physical Review 122, 345 (1961). [2] U. Vogl and W. Weise, Prog. Nucl. Part. Phys. 27, 195 (1991). [3] S. P. Klevansky, Reviews of Modern Physics 64, 649 (1992). [4] T. Frederico, V. S. Timóteo and L. Tomio, Nuclear Physics A 653, 209 (1999).

Primary author


Prof. Edilson Batista (UESB) Prof. Ricardo Farias (UFSM) Prof. Sergio Szpigel (UPM)

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