Gravitino Dark Matter in Tree Level Gauge Mediation with and without R-parity

Abstract

We investigate the cosmological aspects of Tree Level Gauge Mediation, a recently proposed mechanism in which the breaking of supersymmetry is communicated to the soft scalar masses by extra gauge interactions at the tree level. Embedding the mechanism in a Grand Unified Theory and requiring the observability of sfermion masses at the Large Hadron Collider, it follows that the Lightest Supersymmetric Particle is a gravitino with a mass of the order of 10 GeV. The analysis in the presence of R-parity shows that a typical Tree Level Gauge Mediation spectrum leads to an overabundance of the Dark Matter relic density and a tension with the constraints from Big Bang Nucleosynthesis. This suggests to relax the exact conservation of the R-parity. The underlying SO(10) Grand Unified Theory together with the bounds from proton decay provide a rationale for considering only bilinear R-parity violating operators. We finally analyze the cosmological implications of this setup by identifying the phenomenologically viable regions of the parameter space.

28 pages, 5 figures. References added. To appear in JHEP

References in corpus (7)

• The Spectrum of the Isotropic Diffuse Gamma-Ray Emission Derived From First-Year Fermi Large Area Telescope Data
• Implications of Catalyzed BBN in the CMSSM with Gravitino Dark Matter
• Gravitino Dark Matter and general neutralino NLSP
• Dark Matter from Gaugino Mediation
• Indirect detection of gravitino dark matter including its three-body decays
• Broken R-Parity in the Sky and at the LHC
• A new, direct link between the baryon asymmetry and neutrino masses

Cited by in corpus (7)

• Minimal Decaying Dark Matter and the LHC
• Cosmologically Viable Low-energy Supersymmetry Breaking
• A framework for baryonic R-parity violation in grand unified theories
• Low-energy Supersymmetry Breaking Without the Gravitino Problem
• Neutrino masses from R-parity violation with a $Z_3$ symmetry
• Phenomenology of Minimal Unified Tree Level Gauge Mediation at the LHC
• Supersymmetry with long-lived staus at the LHC