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Sommerfeld enhancement of resonant dark matter annihilation

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arxiv 2209.14343 v2 pith:VMEHHSOO submitted 2022-09-28 hep-ph astro-ph.CO

classification hep-phastro-ph.CO
keywords annihilationdarkdark-mattermattersommerfeldamplifiedbeforecancel
verification ladder T0 review T1 audit T2 compute T3 formal
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The dark matter annihilation cross section can be amplified by orders of magnitude if the annihilation occurs into a narrow resonance, or if the dark-matter particles experience a long-range force before annihilation (Sommerfeld effect). We show that when both enhancements are present they factorize completely, that is, all long-distance non-factorizable effects cancel at leading order in the small-velocity and narrow-width expansion. We then investigate the viability of ``super-resonant'' annihilation from the coaction of both mechanisms in Standard Model Higgs portal and simplified MSSM-inspired dark-matter scenarios.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Searching for dark matter annihilating into light long-lived mediators from stars inside dwarf spheroidal galaxies

    astro-ph.HE 2025-01 conditional novelty 5.0 of 10

    Fermi-LAT observations of ten dwarf spheroidals place upper limits on dark matter-nucleon scattering by modeling stellar capture and annihilation through long-lived mediators.

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