Gamma Ray Constraints on Flavor Violating Asymmetric Dark Matter

Abstract

We show how cosmic gamma rays can be used to constrain models of asymmetric Dark Matter decaying into lepton pairs by violating flavor. First of all we require the models to explain the anomalies in the charged cosmic rays measured by PAMELA, FERMI and HESS; performing combined fits we determine the allowed values of the Dark Matter mass and lifetime. For these models, we then determine the constraints coming from the measurement of the isotropic gamma-ray background by FERMI for a complete set of lepton flavor violating primary modes and over a range of DM masses from 100 GeV to 10 TeV. We find that the FERMI constraints rule out the flavor violating asymmetric Dark Matter interpretation of the charged cosmic ray anomalies.

11 pages, 3 figures. v2: constraints derivation slightly modified, conclusions unchanged; some clarifications and some references added; matches version published on JCAP

References in corpus (14)

• Observation of an anomalous positron abundance in the cosmic radiation
• Measurement of the Cosmic Ray e+ plus e- spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope
• The cosmic-ray electron flux measured by the PAMELA experiment between 1 and 625 GeV
• Decaying Dark Matter can explain the electron/positron excesses
• PAMELA data and leptonically decaying dark matter
• Gamma ray constraints on Decaying Dark Matter
• Gamma-Rays from Decaying Dark Matter
• Cosmic rays from Leptonic Dark Matter
• Model-independent dark matter annihilation bound from the diffuse gamma ray flux
• Decaying Dark Matter as a Probe of Unification and TeV Spectroscopy
• Decaying Hidden Gauge Boson and the PAMELA and ATIC/PPB-BETS Anomalies
• Charge Asymmetric Cosmic Ray Signals From Dark Matter Decay
• Impact of the spectral hardening of TeV cosmic rays on the prediction of the secondary positron flux
• Gamma-rays from Nearby Clusters: Constraints on Selected Decaying Dark Matter Models

Cited by in corpus (11)

• Dark matter production in the early Universe: beyond the thermal WIMP paradigm
• Nonstandard Yukawa Couplings and Higgs Portal Dark Matter
• Millicharge or Decay: A Critical Take on Minimal Dark Matter
• Decaying Asymmetric Dark Matter Relaxes the AMS-Fermi Tension
• Recent Result of the AMS-02 Experiment and Decaying Gravitino Dark Matter in Gauge Mediation
• Lepton Flavor Violation Induced by Dark Matter
• Hints of a Charge Asymmetry in the Electron and Positron Cosmic-Ray Excesses
• Indirect Detection Signatures for the Origin of Asymmetric Dark Matter
• Continuous Flavor Symmetries and the Stability of Asymmetric Dark Matter
• Decaying WIMP dark matter for AMS-02 cosmic positron excess
• Asymmetric dark matter and effective number of neutrinos