Sensitivity of the Cherenkov Telescope Array to the detection of a dark matter signal in comparison to direct detection and collider experiments

Abstract

Imaging atmospheric Cherenkov telescopes (IACTs) that are sensitive to potential $\gamma$-ray signals from dark matter (DM) annihilation above $\sim 50$ GeV will soon be superseded by the Cherenkov Telescope Array (CTA).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 $\gamma$-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.

Accepted for publication in PRD. 20 pages, 11 figures

References in corpus (23)

• Results from a search for dark matter in the complete LUX exposure
• Dark Matter Results from 225 Live Days of XENON100 Data
• Precise Relic WIMP Abundance and its Impact on Searches for Dark Matter Annihilation
• Concentration, Spin and Shape of Dark Matter Haloes as a Function of the Cosmological Model: WMAP1, WMAP3 and WMAP5 results
• Constraints on Dark Matter from Colliders
• Searching for Dark Matter Annihilation in Recently Discovered Milky Way Satellites with Fermi-LAT
• Stellar Feedback in Dwarf Galaxy Formation
• Weak Corrections are Relevant for Dark Matter Indirect Detection
• Search for dark matter annihilations towards the inner Galactic halo from 10 years of observations with H.E.S.S
• Review of LHC Dark Matter Searches
• Evidence for dark matter in the inner Milky Way
• Baryonic Pinching of Galactic Dark Matter Halos
• On the Validity of the Effective Field Theory for Dark Matter Searches at the LHC Part III: Analysis for the $t$-channel
• Spin-Dependent Weakly-Interacting-Massive-Particle--Nucleon Cross Section Limits from First Data of PandaX-II Experiment
• XENON100 Dark Matter Results from a Combination of 477 Live Days
• Gamma Ray Line Constraints on Effective Theories of Dark Matter
• Multi-Step Cascade Annihilations of Dark Matter and the Galactic Center Excess
• GammaLib and ctools: A software framework for the analysis of astronomical gamma-ray data
• Prospects for Annihilating Dark Matter in the inner Galactic halo by the Cherenkov Telescope Array
• Search for dark matter in association with a Higgs boson decaying to $b$-quarks in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Imaging Very High Energy Gamma-Ray Telescopes
• Relic density of neutralino dark matter in the MSSM with CP violation
• Effective field theory interpretation of searches for dark matter annihilation in the Sun with the IceCube Neutrino Observatory

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