New Options for SUSY-kind Dark Matter

TL;DR

This paper explores how $R^2$-gravity can allow supersymmetric dark matter particles to have masses much higher than 1 TeV, relaxing conventional cosmological constraints and aligning with LHC bounds.

Contribution

It introduces a framework where $R^2$-gravity modifies dark matter mass bounds, depending on scalaron decay modes, offering new possibilities for SUSY dark matter candidates.

Findings

Dark matter masses can exceed 1 TeV in $R^2$-gravity.

Decay modes influence the mass bounds of SUSY dark matter.

Compatibility with LHC bounds is achieved through modified decay scenarios.

Abstract

In the conventional cosmology masses of the stable supersymmetric relics, candidates for the dark matter (DM) particles, should be typically below 1 TeV. This is in conflict with the LHC bounds on the low energy SUSY. However, in $R^2$-gravity the masses of the stable particles with the interaction strength typical for SUSY could be much higher depending upon the dominant decay mode of the scalaron. We discuss the bounds on the masses of DM particles for the following dominant decay modes: to minimally coupled massless scalars, to massive fermions, and to gauge bosons.