2017/06/30 by Csaba Balázs, Jan Conrad, Ben Farmer +5 · 1 citation
Physics and Astronomy · #astro-ph.HE #hep-ph
paper · pdf · doi:10.1103/physrevd.96.083002
published as Phys. Rev. D 96, 083002 (2017) · Accepted for publication in PRD. 20 pages, 11 figures
arxiv created 2017/09/21 · arxiv updated 2017/10/11
Imaging atmospheric Cherenkov telescopes (IACTs) that are sensitive to potential γ-ray signals from dark matter (DM) annihilation above ∼50 GeV will soon be superseded by the Cherenkov Telescope Array (CTA). CTA will have a point source sensitivity an order of magnitude better than currently operating IACTs and will cover a broad energy range between 20 GeV and 300 TeV. Using effective field theory and simplified models to calculate γ-ray spectra resulting from DM annihilation, we compare the prospects to constrain such models with CTA observations of the Galactic center with current and near-future measurements at the Large Hadron Collider (LHC) and direct detection experiments. For DM annihilations via vector or pseudoscalar couplings, CTA observations will be able to probe DM models out of reach of the LHC, and, if DM is coupled to standard fermions by a pseudoscalar particle, beyond the limits of current direct detection experiments.