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High Energy Physics - Phenomenology

arXiv:2108.06278 (hep-ph)
[Submitted on 13 Aug 2021 (v1), last revised 4 Nov 2021 (this version, v2)]

Title:Self-resonant Dark Matter

Authors:Seong-Sik Kim, Hyun Min Lee, Bin Zhu
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Abstract:We present a novel mechanism for Sommerfeld enhancement for dark matter interactions without the need for light mediators. Considering a model for two-component dark matter with a triple coupling, we find that one of dark matter particles leads to an $u$-channel resonance in dark matter elastic scattering. From the sum of the $u$-channel ladder diagrams, we obtain a Bethe-Salpeter equation with a delay term and identify the Sommerfeld factor from the elastic scattering of two dark matter components for the first time. We discuss the implications of our results for enhancing dark matter self-scattering and annihilation.
Comments: 13 pages, 3 figures, Published version in JHEP
Subjects: High Energy Physics - Phenomenology (hep-ph); Cosmology and Nongalactic Astrophysics (astro-ph.CO); Astrophysics of Galaxies (astro-ph.GA); High Energy Physics - Theory (hep-th)
Cite as: arXiv:2108.06278 [hep-ph]
  (or arXiv:2108.06278v2 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.2108.06278
Related DOI: https://doi.org/10.1007/JHEP10%282021%29239

Submission history

From: Hyun Min Lee [view email]
[v1] Fri, 13 Aug 2021 15:00:41 UTC (186 KB)
[v2] Thu, 4 Nov 2021 11:05:47 UTC (264 KB)
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