Gravity mediation without a Polonyi problem

TL;DR

This paper proposes a solution to the cosmological Polonyi problem in high-scale SUSY models with a 125GeV Higgs, enabling successful leptogenesis by enhancing Polonyi-inflaton coupling.

Contribution

It introduces a mechanism to solve the Polonyi problem by increasing the Polonyi-inflaton coupling, allowing high-scale SUSY models to be cosmologically viable.

Findings

Polonyi problem can be mitigated with enhanced coupling

Leptogenesis scenarios remain viable in this framework

High-scale SUSY models compatible with cosmology

Abstract

Recent indications of the 125GeV Higgs at the LHC can be explained in a relatively high-scale SUSY scenario where the sparticle masses are multi-TeV as is realized in the focus-point region. However, it suffers from the notorious cosmological Polonyi problem. We argue that the Polonyi problem is solved and thermal or non-thermal leptogenesis scenario works successfully, if a certain Polonyi coupling to the inflaton is enhanced by a factor of 10-100.