MSSM soft terms from supergravity with gauged R-symmetry in de Sitter vacuum

TL;DR

This paper explores a supersymmetry breaking model with a positive cosmological constant, coupling a single chiral multiplet to the MSSM, resulting in distinctive low-energy phenomenology and calculable soft masses.

Contribution

It introduces a novel supersymmetry breaking framework with gauged R-symmetry in de Sitter space, linking string moduli to MSSM soft terms.

Findings

Calculable soft supersymmetry breaking masses

Distinct low-energy phenomenology compared to other models

Compatibility with a tiny positive cosmological constant

Abstract

We work out the phenomenology of a model of supersymmetry breaking in the presence of a tiny (tunable) positive cosmological constant, proposed by the authors in arXiv:1403.1534. It utilises a single chiral multiplet with a gauged shift symmetry, that can be identified with the string dilaton (or an appropriate compactification modulus). The model is coupled to the MSSM, leading to calculable soft supersymmetry breaking masses and a distinct low energy phenomenology that allows to differentiate it from other models of supersymmetry breaking and mediation mechanisms.