GMSB at a stable vacuum and MSSM without exotics from heterotic string

Abstract

We show that it is possible to introduce the confining hidden sector gauge group SU(5)′ with the chiral matter 100′ plus 5¯0′, which are neutral under the standard model gauge group, toward a gauge mediated supersymmetry breaking (GMSB) in a Z12−I orbifold compactification of E8×E8′ heterotic string. Three families of MSSM result without exotics. We also find a desirable matter parity P (or R-parity) assignment. We note that this model contains the spectrum of the Lee–Weinberg model which has a nice solution of the μ problem.