%0 Journal Article
%T Exact renormalization group and many-fermion systems
%A B. Krippa
%A M. C. Birse
%A J. A. McGovern
%A N. R. Walet
%J Physics
%D 2004
%I arXiv
%R 10.1142/S0217751X05021889
%X The exact renormalization group methods is applied to many fermion systems with short-range attractive force. The strength of the attractive fermion-fermion interaction is determined from the vacuum scattering length. A set of approximate flow equations is derived including fermionic and bosonic fluctuations. The numerical solutions show a phase transition to a gapped phase. The inclusion of bosonic fluctuations is found to be significant only in the small-gap regime.
%U http://arxiv.org/abs/hep-ph/0407118v1