Non-thermal CMSSM with a 125 GeV Higgs

TL;DR

This paper explores a non-thermal CMSSM model with a 125 GeV Higgs, analyzing its parameter space and experimental constraints, and finds a Higgsino-like dark matter candidate around 300 GeV consistent with current bounds.

Contribution

It introduces a non-thermal CMSSM framework including reheating temperature as a parameter, and studies its phenomenology in light of recent experimental data.

Findings

Higgsino-like LSP around 300 GeV fits the observed dark matter abundance.

Reheating temperatures near 2 GeV can saturate dark matter abundance without overproduction.

Sfermion and gluino masses are predicted to be in the few TeV range.

Abstract

We study the phenomenology of the CMSSM/mSUGRA with non-thermal neutralino dark matter. Besides the standard parameters of the CMSSM we include the reheating temperature as an extra parameter. Imposing radiative electroweak symmetry breaking with a Higgs mass around 125 GeV and no dark matter overproduction, we contrast the scenario with different experimental bounds from colliders (LEP, LHC), cosmic microwave background (Planck), direct (LUX, XENON100, CDMS, IceCube) and indirect (Fermi) dark matter searches. The allowed parameter space is characterised by a Higgsino-like LSP with a mass around 300 GeV. The observed dark matter abundance can be saturated for reheating temperatures around 2 GeV while larger temperatures require extra non-neutralino dark matter candidates and extend the allowed parameter space. Sfermion and gluino masses are in the few TeV region. These scenarios can be achieved in string models of sequestered supersymmetry breaking which avoid cosmological moduli problems and are compatible with gauge coupling unification. Astrophysics and particle physics experiments will fully investigate this non-thermal scenario in the near future.