SUSY-Breaking Scenarios With a Mildly Violated R Symmetry

TL;DR

This paper introduces new gravity-mediated SUSY breaking models with an R symmetry, achieving Minkowski solutions and acceptable R axion masses through controlled R symmetry violation, and addresses the mu problem in MSSM.

Contribution

It presents novel SUSY-breaking scenarios with R symmetry using monomial superpotentials and Kahler potentials, enabling Minkowski solutions without fine tuning.

Findings

Minkowski solutions achieved without fine tuning.

Phenomenologically acceptable R axion masses obtained.

Soft SUSY-breaking parameters consistent with MSSM mu problem.

Abstract

New realizations of the gravity-mediated SUSY breaking are presented consistently with an R symmetry. We employ monomial superpotential terms for the hidden-sector (goldstino) superfield and Kahler potentials parameterizing compact or non-compact Kahler manifolds. Their scalar curvature may be systematically related to the R charge of the goldstino so that Minkowski solutions without fine tuning are achieved. A mild violation of the R symmetry by a higher order term in the Kahler potentials allows for phenomenologically acceptable masses for the R axion. In all cases, non-vanishing soft SUSY-breaking parameters are obtained and a solution to the mu problem of MSSM may be accommodated by conveniently applying the Giudice-Masiero mechanism.