Dark matter scenarios in a constrained model with Dirac gauginos

TL;DR

This paper analyzes dark matter scenarios within a constrained supersymmetric model featuring Dirac gauginos, focusing on the implications of R-symmetry breaking and identifying parameter regions consistent with experimental constraints.

Contribution

It presents the first analysis of dark matter in a constrained Dirac gaugino model, exploring the effects of R-symmetry breaking and different scalar mass scenarios.

Findings

Identified parameter regions satisfying dark matter and experimental constraints.

Most viable points are testable with upcoming direct detection experiments.

Analyzed the impact of R-symmetry breaking on neutralino properties.

Abstract

We perform the first analysis of Dark Matter scenarios in a constrained model with Dirac Gauginos. The model under investigation is the Constrained Minimal Dirac Gaugino Supersymmetric Standard model (CMDGSSM) where the Majorana mass terms of gauginos vanish. However, $R$-symmetry is broken in the Higgs sector by an explicit and/or effective $B_\mu$-term. This causes a mass splitting between Dirac states in the fermion sector and the neutralinos, which provide the dark matter candidate, become pseudo-Dirac states. We discuss two scenarios: the universal case with all scalar masses unified at the GUT scale, and the case with non-universal Higgs soft-terms. We identify different regions in the parameter space which fullfil all constraints from the dark matter abundance, the limits from SUSY and direct dark matter searches and the Higgs mass. Most of these points can be tested with the next generation of direct dark matter detection experiments.