Gamma-ray Constraints on Hadronic and Leptonic Activities of Decaying Dark Matter

Abstract

While the excess in cosmic-ray electrons and positrons reported by PAMELA and Fermi may be explained by dark matter decaying primarily into charged leptons, this does not necessarily mean that dark matter should not have any hadronic decay modes. In order to quantify the allowed hadronic activities, we derive constraints on the decay rates of dark matter into WW, ZZ, hh, qqbar and gg using the Fermi and HESS gamma-ray data. We also derive gamma-ray constraints on the leptonic e+e-, mu+mu- and tau+tau- final states. We find that dark matter must decay primarily into mu+mu- or tau+tau- in order to simultaneously explain the reported excess and meet all gamma-ray constraints.

18 pages, 4 figures;v2: minor changes, references added;v3: a version accepted for publication in JCAP

References in corpus (29)

• PYTHIA 6.4 Physics and Manual
• Observation of an anomalous positron abundance in the cosmic radiation
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Likelihoods and Parameters from the WMAP data
• A Theory of Dark Matter
• Measurement of the Cosmic Ray e+ plus e- spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope
• A new measurement of the antiproton-to-proton flux ratio up to 100 GeV in the cosmic radiation
• New Gamma-Ray Contributions to Supersymmetric Dark Matter Annihilation
• Gamma-ray and radio tests of the e+e- excess from DM annihilations
• PAMELA data and leptonically decaying dark matter
• Gamma Ray Spectrum from Gravitino Dark Matter Decay
• Gamma rays and positrons from a decaying hidden gauge boson
• High-energy electron observations by PPB-BETS flight in Antarctica
• Model-Independent Bound on the Dark Matter Lifetime
• Cosmic rays from Leptonic Dark Matter
• High Energy Positrons and the WMAP Haze from Exciting Dark Matter
• Conservative Constraints on Dark Matter Annihilation into Gamma Rays
• Hidden gauginos of an unbroken U(1): Cosmological constraints and phenomenological prospects
• Cosmic Rays from Leptophilic Dark Matter Decay via Kinetic Mixing
• High-energy Cosmic-Ray Positrons from Hidden-Gauge-Boson Dark Matter
• Extragalactic Inverse Compton Light from Dark Matter Annihilation and the Pamela Positron Excess
• Decaying Hidden Gauge Boson and the PAMELA and ATIC/PPB-BETS Anomalies
• Detecting Gamma-Ray Anisotropies from Decaying Dark Matter: Prospects for Fermi LAT
• The Contribution Of Inverse Compton Scattering To The Diffuse Extragalactic Gamma-Ray Background From Annihilating Dark Matter
• Cascade Events at IceCube+DeepCore as a Definitive Constraint on the Dark Matter Interpretation of the PAMELA and Fermi Anomalies
• Cosmic Gamma-ray from Inverse Compton Process in Unstable Dark Matter Scenario
• High-Energy Neutrino Signatures of Dark Matter Decaying into Leptons
• Fermi LAT Measurements of the Diffuse Gamma-Ray Emission at Intermediate Galactic Latitudes
• The PAMELA and Fermi signals from long-lived Kaluza-Klein dark matter
• Cosmic Ray Spectra in Nambu-Goldstone Dark Matter Models

Cited by in corpus (27)

• Diffuse gamma ray constraints on annihilating or decaying Dark Matter after Fermi
• Gamma ray constraints on Decaying Dark Matter
• The nature of the Diffuse Gamma-Ray Background
• Constraining Very Heavy Dark Matter Using Diffuse Backgrounds of Neutrinos and Cascaded Gamma Rays
• VERITAS Deep Observations of the Dwarf Spheroidal Galaxy Segue 1
• Constraints on Decaying Dark Matter from Fermi Observations of Nearby Galaxies and Clusters
• $e^{\pm }$ Excesses in the Cosmic Ray Spectrum and Possible Interpretations
• Probing the stability of superheavy dark matter particles with high-energy neutrinos
• Novel Constraints on Mixed Dark-Matter Scenarios of Primordial Black Holes and WIMPs
• Implications of the Fermi-LAT diffuse gamma-ray measurements on annihilating or decaying Dark Matter
• Cascade Events at IceCube+DeepCore as a Definitive Constraint on the Dark Matter Interpretation of the PAMELA and Fermi Anomalies
• Annihilation vs. Decay: Constraining dark matter properties from a gamma-ray detection
• Constraints on Dark Matter Annihilation/Decay from the Isotropic Gamma-Ray Background
• Lifetime Constraints for Late Dark Matter Decay
• Indirect and direct signatures of Higgs portal decaying vector dark matter for positron excess in cosmic rays
• Charge Asymmetric Cosmic Ray Signals From Dark Matter Decay
• Constraining Decaying Dark Matter with Fermi LAT Gamma-rays
• AMS-02 Positron Excess and Indirect Detection of Three-body Decaying Dark Matter
• The Electron Injection Spectrum Determined by Anomalous Excesses in Cosmic Ray, Gamma Ray, and Microwave Signals
• Primordial Black Hole as a Source of the Boost Factor
• Decaying Dark Matter in the Supersymmetric Standard Model with Freeze-in and Seesaw mechanims
• Positrons in Cosmic Rays from Dark Matter Annihilations for Uplifted Higgs Regions in MSSM
• AMS02 positron excess from decaying fermion DM with local dark gauge symmetry
• Deep Correlation Between Cosmic-Ray Anomaly and Neutrino Masses
• Dark Stars and Boosted Dark Matter Annihilation Rates
• Decaying Dark Matter in Supersymmetric SU(5) Models
• Interpretation of the cosmic ray positron and electron excesses with an annihilating-decaying dark matter scenario