1/N_c expansion for the partition function in four fermion models
High Energy Physics - Phenomenology
2008-11-26 v1 High Energy Physics - Theory
Nuclear Theory
Abstract
We present a derivation of the bosonic contribution to the thermodynamical potential of four fermion models by means of a -expansion of the functional integral defining the partition function. This expansion turns out to be particularly useful to correct the mean field approximation expecially at low temperatures, where the relevant degrees of freedom are low-mass bosonic excitations (pseudogoldstones).
Keywords
Cite
@article{arxiv.hep-ph/9603358,
title = {1/N_c expansion for the partition function in four fermion models},
author = {A. Barducci and R. Casalbuoni and M. Modugno and G. Pettini and R. Gatto},
journal= {arXiv preprint arXiv:hep-ph/9603358},
year = {2008}
}
Comments
9 pages, latex, no figures