Gravitino dark matter with constraints from Higgs boson mass and sneutrino decays

TL;DR

This paper explores gravitino dark matter production via thermal processes and sneutrino decays within specific supersymmetric models, analyzing constraints from Higgs mass measurements, collider data, and cosmological observations, and finds that reheating temperatures are generally below 10^9 GeV.

Contribution

It identifies viable parameter regions in the Non-Universal Higgs Model and gauge mediation models consistent with Higgs mass and cosmological constraints, highlighting limits on reheating temperature and gravitino mass.

Findings

Reheating temperature TR below 10^9 GeV for consistency.

Gravitino mass constrained to less than 10 GeV.

Allowed Higgs mass range influences TR and gravitino mass limits.

Abstract

We investigate gravitino dark matter produced thermally at high temperatures and in decays of a long-lived sneutrino. We consider the Non-Universal Higgs Model and a generalized gauge mediation model, and in each case identify sneutrino LOSP regions of the parameter space consistent with the mass of the Higgs-like boson observed at the LHC. We apply relevant collider and cosmological bounds, including constraints from Big Bang Nucleosynthesis and from warm dark matter on large scale structures. Generally, we find allowed values of the reheating temperature TR below 10^9 GeV, i.e. somewhat smaller than the values needed for thermal leptogenesis, even with a conservative lower bound of 122 GeV on the Higgs mass. Requiring mass values closer to 126 GeV implies TR below 10^7 GeV and the gravitino mass less than 10 GeV.