Renormalization group analysis of the three-dimensional Gross-Neveu model at finite temperature and density
P. Castorina, M. Mazza, D. Zappala'
Abstract
The Renormalization Group flow equations obtained by means of a proper time regulator are used to analyze the restoration of the discrete chiral symmetry at non-zero density and temperature in the Gross-Neveu model in d=2+1 dimensions. The effects of the wave function renormalization of the auxiliary scalar field on the transition have been studied. The analysis is performed for a number of fermion flavors Nf=12 and the limit of large Nf is also considered. The results are compared with those coming from lattice simulations.
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