NEW MODELS OF GAUGE MEDIATED DYNAMICAL SUPERSYMMETRY BREAKING

We propose a simple class of nonrenormalizable models of gauge mediate d dynamical supersymmetry breaking. The models do not have gauge singl et fields. The Standard Model gauge group is embedded in the global sy mmetry of the SUSY breaking sector. At the renormalizable level the mo dels possess a set of classical flat directions. Only one of those fla t directions is unlifted by quantum effects, and requires nonrenormali zable term to stabilize the potential for the corresponding modulus. L arge vacuum expectation value of this modulus at the minimum of the po tential generates mass terms for the messenger fields. There are no li ght messengers, thus this class of models evades difficulties encounte red in earlier constructions using nonrenormalizable models. (C) 1998 Elsevier Science B.V.