High Energy Cosmic Rays from the Decay of Gravitino Dark Matter
arXiv:0805.1133 · doi:10.1103/PhysRevD.78.063505
Abstract
We study gamma ray and positron in high energy cosmic ray from the decay of the gravitino dark matter in the framework of supersymmetric model with R-parity violation. Even though R-parity is violated, the lifetime of the gravitino, which is assumed to be the lightest superparticle, can be longer than the present age of the universe if R-parity violating interactions are weak enough. In such a case, gravitino can be dark matter of the universe and its decay produces high energy cosmic rays. We calculate the fluxes of gamma ray and positron from the decay of the gravitino dark matter and discuss implications of such a scenario to present and future observations. In particular, we show that excesses of the fluxes of gamma ray and positron observed by EGRET and HEAT experiments, respectively, can be simultaneously explained as the cosmic rays from the decay of the gravitino dark matter.
28 pages, 9 figures
References in corpus (16)
- PYTHIA 6.4 Physics and Manual
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
- Big-Bang Nucleosynthesis and Gravitino
- Moduli-Induced Gravitino Problem
- Moduli Decays and Gravitinos
- Inflaton Decay in Supergravity
- The Gravitino-Overproduction Problem in Inflationary Universe
- Gamma Ray Spectrum from Gravitino Dark Matter Decay
- Gravitinos from Heavy Scalar Decay
- Moduli/Inflaton Mixing with Supersymmetry Breaking Field
- Gamma-Rays from Decaying Dark Matter
- Antimatter Signatures of Gravitino Dark Matter Decay
- Anomaly-Induced Inflaton Decay and Gravitino-Overproduction Problem
- The Role of Antimatter Searches in the Hunt for Supersymmetric Dark Matter
- Cosmic Positron Signature from Dark Matter in the Littlest Higgs Model with T-parity
- Can Dark Matter Annihilation Dominate the Extragalactic Gamma-Ray Background?
Cited by in corpus (17)
- PAMELA data and leptonically decaying dark matter
- Enhancement of Dark Matter Annihilation via Breit-Wigner Resonance
- Hidden gauginos of an unbroken U(1): Cosmological constraints and phenomenological prospects
- Cosmic Rays from Leptophilic Dark Matter Decay via Kinetic Mixing
- Right-handed Neutrinos in F-theory Compactifications
- Anomaly Induced Dark Matter Decay and PAMELA/ATIC Experiments
- R-violating Decay of Wino Dark Matter and electron/positron Excesses in the PAMELA/Fermi Experiments
- Probing Gravitino Dark Matter with PAMELA and Fermi
- Long-Lived Unstable Superparticles at the LHC
- Dark matter in the supersymmetric radiative seesaw model with an anomalous U(1) symmetry
- CP Violation in the SUSY Seesaw: Leptogenesis and Low Energy
- Why have supersymmetric particles not been observed?
- Signals of dark matter in a supersymmetric two dark matter model
- Gamma-rays from Nearby Clusters: Constraints on Selected Decaying Dark Matter Models
- Gravitino Dark Matter and the Flavour Structure of R-violating Operators
- R-parity Violating Right-Handed Neutrino in Gravitino Dark Matter Scenario
- Gauge Mediation with Sequestered Supersymmetry Breaking