Effective Potential of Nambu--Jona-Lasinio Model in Differential Regularization

Abstract

The method of differential regularization is applied to calculate explicitly the one-loop effective potential of a bosonized Nambu--Jona-Lasinio model consisting of scalar and pseudoscalar fields. The regularization scheme independent relation for the $\sigma$ mass sum rule is obtained. This method can be readily applied to extended NJL models with gauge fields.

arXiv comment13 pages