1/N_c expansion for the partition function in four fermion models

Details 1/N_c expansion for the partition function in four fermion models 1/N_c expansion for the partition function in four fermion models

1996-03-20

arxiv.org/abs/hep-ph/9603358v1

Mod.Phys.Lett.A11:1579-1587,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, latex, no figures

Scientific paper

10.1142/S0217732396001570

We present a derivation of the bosonic contribution to the thermodynamical potential of four fermion models by means of a $1/N_c$-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).

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