Suppressing gravitino thermal production with a temperature-dependent messenger coupling

Abstract

We show that the constraints on GMSB theories from the gravitino cosmology can be significantly relaxed if the messenger-spurion coupling is temperature dependent. We demonstrate this novel mechanism in a scenario in which this coupling depends on the VEV of an extra singlet field $S$ that interacts with the thermalized plasma which can result in a significantly suppressed gravitino production rate. In such a scenario the relic gravitino abundance is determined by the thermal dynamics of the $S$ field and it is easy to fit the observed dark matter abundance evading the stringent constraints on the reheating temperature, thus making gravitino dark matter consistent with thermal leptogenesis.

27 pages, 6 figures, 3 tables, plain text

References in corpus (6)

• Leptogenesis
• Thermal production of gravitinos
• Natural mu and Bmu in gauge mediation
• Dynamical mu Term in Gauge Mediation
• Gravitational waves from domain walls in the next-to-minimal supersymmetric standard model
• Axion model in gauge-mediated supersymmetry breaking and a solution to the mu/Bmu problem

Cited by in corpus (4)

• Prompt Signals and Displaced Vertices in Sparticle Searches for Next-to-Minimal Gauge Mediated Supersymmetric Models
• Probing the BSM physics with CMB precision cosmology: an application to supersymmetry
• Gravitino Thermal Production, Dark Matter, and Reheating of the Universe
• Gravitino Production Suppressed by Dynamics of Sgoldstino