Some Implications of the Leptonic Annihilation of Dark Matter: Possible Galactic Radio Emission Signatures and the Excess Radio Flux of Extragalactic Origin

Abstract

We give theoretical predictions for the radio emission of a dark matter candidate annihilating into 2-lepton and 4-lepton final states. We then compare our results with the known radio measurements of the sky temperature as a function of the frequency. In particular, we calculate the radio emission for some dark matter candidates annihilating into intermediate bosons that subsequently decay into a 4-lepton channel with a thermal annihilation cross-section. We show that within the range of frequencies from $20\mathrm{MHz}$ to $5\mathrm{GHz}$, this channel can produce a stronger signature than direct annihilation into leptons.

arXiv comment18 pages, 28 figures. Version accepted for publication

References in corpus (35)

• Planck 2015 results. XIII. Cosmological parameters
• The Structure of Cold Dark Matter Halos
• A direct empirical proof of the existence of dark matter
• A Theory of Dark Matter
• Results from a search for dark matter in the complete LUX exposure
• Secluded WIMP Dark Matter
• Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi-LAT Data
• MultiDark simulations: the story of dark matter halo concentrations and density profiles
• PPPC 4 DM ID: A Poor Particle Physicist Cookbook for Dark Matter Indirect Detection
• On The Origin Of The Gamma Rays From The Galactic Center
• Fermi-LAT Observations of High-Energy Gamma-Ray Emission Toward the Galactic Center
• Dark matter maps reveal cosmic scaffolding
• ARCADE 2 Measurement of the Extra-Galactic Sky Temperature at 3-90 GHz
• Fermi LAT Search for Internal Bremsstrahlung Signatures from Dark Matter Annihilation
• LHC Signals for a SuperUnified Theory of Dark Matter
• Constraining the Spin-Dependent WIMP-Nucleon Cross Sections with XENON1T
• Gamma Ray Signals from Dark Matter: Concepts, Status and Prospects
• Current Dark Matter Annihilation Constraints from CMB and Low-Redshift Data
• The radio emission from the Galaxy at 22 MHz
• Spin-Dependent Weakly-Interacting-Massive-Particle--Nucleon Cross Section Limits from First Data of PandaX-II Experiment
• High Energy Positrons and the WMAP Haze from Exciting Dark Matter
• Multi-Step Cascade Annihilations of Dark Matter and the Galactic Center Excess
• AMS-02 Antiprotons Reloaded
• A dark matter interpretation for the ARCADE excess?
• The Cosmic Ray Antiproton Background for AMS-02
• The Radio Synchrotron Background: Conference Summary and Report
• Synchrotron Radiation from the Galactic Center in Decaying Dark Matter Scenario
• Galactic synchrotron emission from WIMPs at radio frequencies
• The pinching method for Galactic cosmic ray positrons: implications in the light of precision measurements
• Search for $\gamma$-ray emission from dark matter particle interactions from Andromeda and Triangulum Galaxies with the Fermi Large Area Telescope
• PPPC 4 DM secondary: A Poor Particle Physicist Cookbook for secondary radiation from Dark Matter
• Non-Abelian Vector Boson Dark Matter, its Unified Route and signatures at the LHC
• Cluster Mergers and the Origin of the ARCADE-2 Excess
• Secluded WIMPs, QED with massive photons, and the galactic center gamma-ray excess
• Updated galactic radio constraints on Dark Matter

Cited by in corpus (3)

• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• The Second Radio Synchrotron Background Workshop: Conference Summary and Report
• Disentangling the anisotropic radio sky: Fisher forecasts for 21cm arrays