Electro-Weak Dark Matter: non-perturbative effect confronting indirect detections

Abstract

We update indirect constraints on Electro-Weak Dark Matter (EWDM) considering the Sommerfeld-Ramsauer-Townsend (SRT) effect for its annihilations into a pair of standard model gauge bosons assuming that EWDM accounts for the observed dark matter (DM) relic density for a given DM mass and mass gaps among the multiplet components. For the radiative or smaller mass splitting, the hypercharged triplet and higher multiplet EWDMs are ruled out up to the DM mass ~ 10 - 20 TeV by the combination of the most recent data from AMS-02 (antiproton), Fermi-LAT (gamma-ray), and HESS (gamma-line). The Majorana triplet (wino-like) EWDM can evade all the indirect constraints only around Ramsauer-Townsend dips which can occur for a tiny mass splitting of order 10 MeV or less. In the case of the doublet (Higgsino-like) EWDM, a wide range of its mass > 500 GeV is allowed except Sommerfeld peak regions. Such a stringent limit on the triplet DM can be evaded by employing a larger mass gap of the order of 10 GeV which allows its mass larger than about 1 TeV. However, the future CTA experiment will be able to cover most of the unconstrained parameter space.

17 pages, 4 figures; result for an O(10 GeV) mass gap, future sensitivity of CTA, and references added

References in corpus (6)

• A Theory of Dark Matter
• Cosmology and Astrophysics of Minimal Dark Matter
• Search for photon line-like signatures from Dark Matter annihilations with H.E.S.S
• Heavy Dark Matter Annihilation from Effective Field Theory
• Prospects for Annihilating Dark Matter in the inner Galactic halo by the Cherenkov Telescope Array
• Direct constraints on diffusion models from cosmic-ray positron data: Excluding the Minimal model for dark matter searches

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• Probing the Inert Doublet Dark Matter Model with Cherenkov Telescopes
• Phenomenology of left-right symmetric dark matter
• Millicharge or Decay: A Critical Take on Minimal Dark Matter
• Dark Matter in $\gamma$ lines: Galactic Center vs dwarf galaxies
• Electroweak Kaluza-Klein Dark Matter
• Very Degenerate Higgsino Dark Matter
• Minimal Dark Matter in the Local $B-L$ Extension
• Minimal asymptotically safe dark matter
• Self-interacting Dark Matter with Scalar Dilepton Mediator
• Confronting Dirac Fermionic Dark Matter with Recent Data