Mediation of Supersymmetry Breaking in a Class of String Theory Models

TL;DR

This paper presents a class of string theory models that incorporate supersymmetry breaking, addressing flavor neutrality, quadratic divergences, and phenomenological viability with minimal moduli fields.

Contribution

It introduces a new class of models from GKP-KKLT type IIB compactifications that are consistent with gauge unification and minimal supergravity moduli.

Findings

Models yield reasonable soft masses and gaugino masses

They incorporate all necessary features for phenomenological viability

Minimal moduli fields are sufficient for consistent supersymmetry breaking

Abstract

A consistent theory of supersymmetry breaking must have a hidden sector, an observable sector, and must be embedded in a locally supersymmetric theory which arises from string theory. For phenomenological reasons it must also transmit supersymmetry from the hidden to the visible sector in a dominantly flavor neutral manner. Also any such theory of supersymmetry breaking has to take into account the problem of quadratic divergences which arise once the theory is embedded in supergravity. A class of possible models that arise from GKP-KKLT type IIB string compactifications, incorporating all this while being consistent with gauge unification, with just the bare minimum of necessary supergravity/string theory moduli fields coupled to the minimally supersymmetric standard model, is presented. Such models give reasonable values for the soft masses, the $\mu$ and $B\mu$ terms and the gaugino masses. Assuming that an actual detailed realization exists, it is very likely that they are the simplest such possibility .