Phase Transitions in NJL and super-NJL models

Details Phase Transitions in NJL and super-NJL models Phase Transitions in NJL and super-NJL models

1993-07-27

arxiv.org/abs/hep-th/9307162v1

Physics

High Energy Physics

High Energy Physics - Theory

LATEX, 1 figure available upon request, 11 pages, TUM-TH-157/93, MPI-Ph/93-42, UW-IFT-10/93

Scientific paper

An elementary method of determination of the character of the hot phase transition in 4d four-fermion NJL-type models is applied to non-supersymmetric and supersymmetric versions of simple NJL model. We find that in the non-susy case the transition is usually of the second order. It is weakly first order only in the region of parameters which correspond to fermion masses comparable to the cut-off. In the supersymmetric case both kinds of phase transitions are possible. For sufficiently strong coupling and sufficiently large susy-breaking scale the transition is always of the first order.

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