2015/05/31 by Jongkuk Kim, Jong-Chul Park, Jong‐Kuk Kim +1 · 1 citation
Physics and Astronomy · #Annihilation #Astrophysics #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Electron #Fermion #Galactic Center #Galaxy #Gamma ray #Lepton #Light dark matter #Muon #Neutrino #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Scalar field dark matter #Standard Model (mathematical formulation) #Warm dark matter #astro-ph.HE #hep-ph
paper · pdf · doi:10.1016/j.physletb.2015.11.035
published as Phys.Lett. B752 (2016) 59-65 · 18 pages, 8 figures, references added, matches published version
openalex publication_date 2015/11/17 · openalex created_date 2016/06/24 · arxiv created 2016/09/19 · arxiv updated 2016/09/29 · openalex updated_date 2026/08/05
The recently observed excess in gamma-ray signal near the Galactic center suggests that dark matter particles may annihilate into charged fermions that produce gamma-ray to be observed. In this paper, we consider a leptonic dark matter, which annihilates into the standard model leptons , μ + μ − and τ + τ − , by the interaction of the gauged lepton number U ( 1 ) L μ − L τ and fits the observed excess. Interestingly, the necessary annihilation cross section for the observed gamma-ray flux provides a good fit to the value for the relic abundance of dark matter. We identify the preferred parameter space of the model after taking the existing experimental constraints from the precision measurements including the muon ( g − 2 ) , tau decay, neutrino trident production, dark matter direct detection, LHC, and LEP experiments.