2008/03/31 by Rainer Dick, Robert B. Mann, Kai E. Wunderle
Physics and Astronomy · #Annihilation #Astrophysics #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Electroweak interaction #Gauge (firearms) #Higgs boson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Scalar field dark matter #Singlet state #Standard Model (mathematical formulation) #Weakly interacting massive particles #astro-ph #hep-ph
paper · pdf · doi:10.1016/j.nuclphysb.2008.07.016
published as Nucl.Phys.B805:207-230,2008 · 21 pages, 13 figures
arxiv created 2008/07/16 · openalex publication_date 2008/07/24 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider electroweak singlet dark matter with a mass comparable to the Higgs mass. The singlet is assumed to couple to standard matter through a perturbative coupling to the Higgs particle. The annihilation of a singlet with a mass comparable to the Higgs mass is dominated by proximity to the W, Z and Higgs peaks in the annihilation cross section. We find that the continuous photon spectrum from annihilation of a perturbatively coupled singlet in the galactic halo can reach a level of several per mil of the EGRET diffuse gamma ray flux.