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

TL;DR

This paper demonstrates a heterotic string model that achieves gauge mediated supersymmetry breaking with a stable vacuum, producing three MSSM families without exotics and solving the mu problem.

Contribution

It constructs a heterotic string compactification with a confining hidden sector and realistic MSSM spectrum, including matter parity and no exotic particles.

Findings

Realistic MSSM spectrum without exotics

Successful gauge mediated supersymmetry breaking

Solution to the mu problem within the model

Abstract

We show that it is possible to introduce the confining hidden sector gauge group SU(5)' with the chiral matter 10 plus 5-bar, which are neutral under the standard model gauge group, toward a gauge mediated supersymmetry breaking (GMSB) in a Z_{12-I} orbifold compactification of E_8xE_8 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 mu problem.