Gamma-rays from Nearby Clusters: Constraints on Selected Decaying Dark Matter Models
arXiv:1101.5878 · doi:10.1016/j.physletb.2011.02.055
Abstract
Recently, the Fermi-LAT collaboration reported upper limits on the GeV gamma-ray flux from nearby clusters of galaxies. Motivated by these limits, we study corresponding constraints on gamma-ray emissions from two specific decaying dark matter models, one via grand unification scale suppressed operators and the other via R-parity violating operators. Both can account for the PAMELA and Fermi-LAT excesses of e^\pm. For GUT decaying dark matter, the gamma-rays from the M49 and Fornax clusters, with energy in the range of 1 to 10 GeV, lead to the most stringent constraints to date. As a result, this dark matter is disfavored with conventional model of e^\pm background. In addition, it is likely that some tension exists between the Fermi-LAT e^\pm excess and the gamma ray constraints for any decaying dark matter model, provided conventional model of e^\pm background is adopted. Nevertheless, the GUT decaying dark matter can still solely account for the PAMELA positron fraction excess without violating the gamma-ray constraints. For the gravitino dark matter model with R-parity violation, cluster observations do not give tight constraints. This is because a different e^\pm background has been adopted which leads to relatively light dark matter mass around 200 GeV.
17 pages, 4 figures, version to appear in Phys. Lett. B
References in corpus (43)
- PYTHIA 6.4 Physics and Manual
- PYTHIA 6.2 Physics and Manual
- Observation of an anomalous positron abundance in the cosmic radiation
- The Mass Function of an X-Ray Flux-Limited Sample of Galaxy Clusters
- Measurement of the Cosmic Ray e+ plus e- spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope
- PAMELA results on the cosmic-ray antiproton flux from 60 MeV to 180 GeV in kinetic energy
- Model-independent implications of the e+, e-, anti-proton cosmic ray spectra on properties of Dark Matter
- Gravitino Dark Matter in R-Parity Breaking Vacua
- New Positron Spectral Features from Supersymmetric Dark Matter - a Way to Explain the PAMELA Data?
- Decaying Dark Matter can explain the electron/positron excesses
- Gamma-ray and radio tests of the e+e- excess from DM annihilations
- Diffuse gamma ray constraints on annihilating or decaying Dark Matter after Fermi
- Constraints on Dark Matter Annihilation in Clusters of Galaxies with the Fermi Large Area Telescope
- Inverse Compton constraints on the Dark Matter e+e- excesses
- Astrophysical Probes of Unification
- High Energy Positrons From Annihilating Dark Matter
- High Energy Cosmic Rays from the Decay of Gravitino Dark Matter
- Robust implications on Dark Matter from the first FERMI sky gamma map
- Dark Matter as the signal of Grand Unification
- Decaying Dark Matter in Light of the PAMELA and Fermi LAT Data
- Constraints on Decaying Dark Matter from Fermi Observations of Nearby Galaxies and Clusters
- Decaying Dark Matter as a Probe of Unification and TeV Spectroscopy
- High-energy Cosmic-Ray Positrons from Hidden-Gauge-Boson Dark Matter
- Gamma Rays from Clusters and Groups of Galaxies: Cosmic Rays versus Dark Matter
- Detecting Gamma-Ray Anisotropies from Decaying Dark Matter: Prospects for Fermi LAT
- R-violating Decay of Wino Dark Matter and electron/positron Excesses in the PAMELA/Fermi Experiments
- High Energy Cosmic Rays from Decaying Supersymmetric Dark Matter
- R-Parity Breaking via Type II Seesaw, Decaying Gravitino Dark Matter and PAMELA Positron Excess
- Probing Gravitino Dark Matter with PAMELA and Fermi
- Universally Leptophilic Dark Matter From Non-Abelian Discrete Symmetry
- Gamma-rays from dark matter annihilations strongly constrain the substructure in halos
- Decaying into the Hidden Sector
- Cosmic Gamma-ray from Inverse Compton Process in Unstable Dark Matter Scenario
- Indirect detection of gravitino dark matter including its three-body decays
- Gamma rays and neutrinos from dark matter annihilation in galaxy clusters
- Photon, Neutrino and Charged Particle Spectra from R-violating Gravitino Decays
- The Supersymmetric Standard Models with Decay and Stable Dark Matters
- Decaying gravitino dark matter and an upper bound on the gluino mass
- Decaying Dark Matter from Dark Instantons
- Decaying Dark Matter in Supersymmetric Model and Cosmic-Ray Observations
- Galactic diffuse gamma rays --- recalculation based on the new measurements of cosmic electron spectrum
- Decaying Dark Matter in Supersymmetric SU(5) Models
- Decaying LSP in SO(10) GUT and PAMELA's Cosmic Positron
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- Gamma ray constraints on Decaying Dark Matter
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- Indirect Searches for Decaying Dark Matter
- Probing Dark Matter Decay and Annihilation with Fermi LAT Observations of Nearby Galaxy Clusters
- Constraining Dark Matter lifetime with a deep gamma-ray survey of the Perseus Galaxy Cluster with MAGIC
- Decaying dark matter: a stacking analysis of galaxy clusters to improve on current limits
- Search for dark matter signals with Fermi-LAT observation of globular clusters NGC 6388 and M 15
- Gamma Ray Constraints on Flavor Violating Asymmetric Dark Matter
- Can Planck constrain indirect detection of dark matter in our galaxy?
- Extracting the size of the cosmic electron-positron anomaly
- A Froggatt-Nielsen Model for Leptophilic Scalar Dark Matter Decay
- Towards a Bullet-proof test for indirect signals of dark matter
- A Model Independent Method to Study Dark Matter induced Leptons and Gamma rays