Decaying gravitino dark matter and an upper bound on the gluino mass

Abstract

We show that, if decaying gravitino dark matter is responsible for the PAMELA and ATIC/PPB-BETS anomalies in the cosmic-ray electron and positron fluxes, both a reheating temperature and a gluino mass are constrained from above. In particular, the gluino mass is likely within the reach of LHC, if the observed baryon asymmetry is explained by thermal leptogenesis scenario.

9 pages, 3 figures. v2: references added

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• PYTHIA 6.4 Physics and Manual
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• Cosmic-ray positron fraction measurement from 1 to 30 GeV with AMS-01
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• The Gravitino-Overproduction Problem in Inflationary Universe
• Gamma Ray Spectrum from Gravitino Dark Matter Decay
• Gamma rays and positrons from a decaying hidden gauge boson
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• Gravitino Dark Matter from Inflaton Decay
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Cited by in corpus (15)

• $e^{\pm }$ Excesses in the Cosmic Ray Spectrum and Possible Interpretations
• R-violating Decay of Wino Dark Matter and electron/positron Excesses in the PAMELA/Fermi Experiments
• Dark matter and collider phenomenology of split-UED
• Probing Gravitino Dark Matter with PAMELA and Fermi
• Imprint of Multi-component Dark Matter on AMS-02
• A Brief Review on Dark Matter Annihilation Explanation for $e^{\pm }$ Excesses in Cosmic Ray
• MSSM in view of PAMELA and Fermi-LAT
• Decaying Hidden Dark Matter in Warped Compactification
• Gamma-rays from Nearby Clusters: Constraints on Selected Decaying Dark Matter Models
• Decaying Dark Matter from Dark Instantons
• Decaying Dark Matter in Supersymmetric Model and Cosmic-Ray Observations
• R-parity Violating Right-Handed Neutrino in Gravitino Dark Matter Scenario
• Neutrino Masses, Leptogenesis and Decaying Dark Matter
• The long-lived stau as a thermal relic
• Revisiting gravitino dark matter in thermal leptogenesis