SUPERSYMMETRY BREAKING IN THE NAMBU-JONA-LASINIO APPROACH

Gaugino condensation in the hidden sector of supergravity models is de scribed within a Nambu-Jona-Lasinio type of approach by minimization o f a one-loop scalar potential. The essential ingredients of the mechan ism are auxiliary superfields whose v.e.v. generate gaugino condensati on and supersymmetry breaking, introduced through Lagrange multipliers . For phenomenologically acceptable values of the gauge couplings, gau gino condensation is disfavoured in this approach. For completeness, i t is shown that supersymmetry breaking would occur for a stronger coup ling, but at a scale inconsistent with the expectations.