Dark matter annihilation into right-handed neutrinos and the galactic center gamma-ray excess

Abstract

In this paper, we will discuss a specific case that the dark matter particles annihilate into right-handed neutrinos. We calculate the predicted gamma-ray excess from the galactic center and compare our results with the data from the Fermi-LAT. An approximately 10-60 GeV right-handed neutrino with heavier dark matter particle can perfectly explain the observed spectrum. The annihilation cross section $⟨\sigma v⟩$ falls within the range $0.5$-$4\times 10^{-26}{\text{ cm}}^3/\text{s}$, which is roughly compatible with the WIMP annihilation cross section.

11 pages, 5 figures

References in corpus (19)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi-LAT Data
• Neutrinos and Collider Physics
• Background model systematics for the Fermi GeV excess
• micrOMEGAs4.1: two dark matter candidates
• Non-unitarity of the leptonic mixing matrix: Present bounds and future sensitivities
• Testing sterile neutrino extensions of the Standard Model at future lepton colliders
• Direct Bounds on Electroweak Scale Pseudo-Dirac Neutrinos from $\sqrt{s}=8$ TeV LHC Data
• Indication of Gamma-ray Emission from the Newly Discovered Dwarf Galaxy Reticulum II
• WIMPs at the Galactic Center
• Search for heavy Majorana neutrinos in mu+/- mu+/- + jets events in proton-proton collisions at sqrt(s) = 8 TeV
• Fermionic dark matter with pseudo-scalar Yukawa interaction
• Right-handed sneutrino dark matter in the NMSSM
• On The Gamma-Ray Emission From Reticulum II and Other Dwarf Galaxies
• A model-independent analysis of the Fermi Large Area Telescope gamma-ray data from the Milky Way dwarf galaxies and halo to constrain dark matter scenarios
• Galactic Centre GeV Photons from Dark Technicolor
• Sneutrino Dark Matter and the Observed Anomalies in Cosmic Rays
• Dark Higgs Channel for FERMI GeV $\gamma$-ray Excess

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• Indirect Signals from Solar Dark Matter Annihilation to Long-lived Right-handed Neutrinos
• Evidence of TeV Halos Around Millisecond Pulsars
• A Systematic Study of Hidden Sector Dark Matter: Application to the Gamma-Ray and Antiproton Excesses
• Sterile Neutrino Portal Dark Matter in $\nu$THDM
• Phenomenology of Colored Radiative Neutrino Mass Model and Its Implications on the Cosmic-ray Observations
• $1\leftrightarrow 2$ Processes of a Sterile Neutrino Around Electroweak Scale in the Thermal Plasma
• Structures of the Massive Vector Boson Propagators at Finite Temperature Illuminated by the Goldstone Equivalence Gauge
• Dark matter properties implied by gamma ray interstellar emission models