Indirect Detection of Composite (Asymmetric) Dark Matter

Abstract

Dark Matter can form bound states upon the emission of quanta of energy equal to the binding energy. The rate of this process is large for strongly-interacting Dark Matter, and further enhanced by long distance effects. The resulting monochromatic and diffuse $\gamma$-rays can be tested in indirect detection experiments. If Dark Matter has electroweak charge, indirect signals include multiple observable photon lines for masses in the TeV range. Else if it couples only via a dark photon portal, diffuse spectra from dwarf galaxies and CMB reionization set powerful limits for masses below a TeV. This mechanism provides a powerful means of probing Asymmetric Dark Matter today.

arXiv comment6 pages, 4 figures. v2) matches PRD version, updated figure 2

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Cited by in corpus (10)

• Dark Matter Spectra from the Electroweak to the Planck Scale
• Glueball scattering cross section in lattice SU(2) Yang-Mills theory
• A Practical and Consistent Parametrization of Dark Matter Self-Interactions
• Maximally self-interacting dark matter: models and predictions
• Indirect searches for dark matter bound state formation and level transitions
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• Asymmetric accidental composite dark matter
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• Closing the window on WIMP Dark Matter
• Composite asymmetric dark matter with a dark photon portal: Multimessenger tests