Gravitino dark matter in the constrained next-to-minimal supersymmetric standard model with neutralino next-to-lightest superpartner

TL;DR

This paper examines the cosmological viability of gravitino dark matter within the constrained NMSSM, considering collider and cosmological constraints, gravitino production mechanisms, and limits on reheating temperature and gravitino mass.

Contribution

It provides a comprehensive analysis of gravitino dark matter in the cNMSSM, including production mechanisms and cosmological constraints, which was not extensively studied before.

Findings

Maximum allowed reheating temperature is determined.

Maximum gravitino mass consistent with constraints is identified.

Viability of gravitino as dark matter in cNMSSM is established.

Abstract

The viability of a possible cosmological scenario is investigated. The theoretical framework is the constrained next-to-minimal supersymmetric standard model (cNMSSM), with a gravitino playing the role of the lightest supersymmetric particle (LSP) and a neutralino acting as the next-to-lightest supersymmetric particle (NLSP). All the necessary constraints from colliders and cosmology have been taken into account. For gravitino we have considered the two usual production mechanisms, namely out-of equillibrium decay from the NLSP, and scattering processes from the thermal bath. The maximum allowed reheating temperature after inflation, as well as the maximum allowed gravitino mass are determined.