GAUGE-MEDIATED SUPERSYMMETRY BREAKING WITHOUT FUNDAMENTAL SINGLETS

The messenger sector of existing models of gauge-mediated supersymmetr y breaking may be simplified by using a nonrenormalizable superpotenti al term to couple the vector-like quark and lepton messenger fields to a chiral gauge invariant of the supersymmetry-breaking sector. This e liminates the need for a fundamental singlet and for an additional gau ge sector needed to generate appropriate expectation Values for the si nglet component fields. This scenario is more natural if the supersymm etry-breaking sector itself involves a non-renormalizable superpotenti al. Several examples are constructed based on non-renormalizable SU(n) x SU(n-1) supersymmetry-breaking theories. (C) 1997 Published by Else vier Science B.V.