2016/03/31 by Alessandro Cuoco, Benedikt Eiteneuer, Jan Heisig +1 · 2 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Dark fluid #Dark matter #Dark matter halo #Higgs boson #Light dark matter #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #Scalar field dark matter #WIMP #Warm dark matter #Weakly interacting massive particles #astro-ph.HE #hep-ph
paper · pdf · doi:10.1088/1475-7516/2016/06/050
published as JCAP06(2016)050 · 20 pages + references, 12 figures; v2: minor changes in presentation, references added, improved scan coverage and updated plots in figs. 6, 8, 9, 10 and 12 accordingly, conclusions unchanged, matches journal version
arxiv created 2016/06/23 · openalex created_date 2016/06/24 · openalex publication_date 2016/06/28 · arxiv updated 2016/06/29 · openalex updated_date 2026/08/05
We analyse the excess in the γ-ray emission from the center of our galaxy observed by Fermi -LAT in terms of dark matter annihilation within the scalar Higgs portal model. In particular, we include the astrophysical uncertainties from the dark matter distribution and allow for unspecified additional dark matter components. We demonstrate through a detailed numerical fit that the strength and shape of the γ-ray spectrum can indeed be described by the model in various regions of dark matter masses and couplings. Constraints from invisible Higgs decays, direct dark matter searches, indirect searches in dwarf galaxies and for γ-ray lines, and constraints from the dark matter relic density reduce the parameter space to dark matter masses near the Higgs resonance. We find two viable regions: one where the Higgs-dark matter coupling is of (10 −2 ), and an additional dark matter component beyond the scalar WIMP of our model is preferred, and one region where the Higgs-dark matter coupling may be significantly smaller, but where the scalar WIMP constitutes a significant fraction or even all of dark matter. Both viable regions are hard to probe in future direct detection and collider experiments.