Indirect Searches for Dark Photon-Photon Tridents in Celestial Objects
hep-ph, astro-ph.CO, astro-ph.HE
Submitted: 2024-02-02
Updated: 2026-08-27
Comments: 18 pages, 9 figures, 3 tables. Accepted to JCAP
Journal ref: JCAP 08 (2026) 056
DOI: 10.1088/1475-7516/2026/08/056
License: http://creativecommons.org/licenses/by/4.0/
The gist: We model and constrain the unique indirect detection signature produced by dark matter particles that annihilate through a U(1) gauge symmetry into dark photons that subsequently decay into
Terminology
Abstract
We model and constrain the unique indirect detection signature produced by dark matter particles that annihilate through a U(1) gauge symmetry into dark photons that subsequently decay into three-photon final states. We focus on scenarios where the dark photon is long-lived, and show that γ-ray probes of celestial objects can set strong constraints on the dark matter/baryon scattering cross section that in many cases surpass the power of current direct detection constraints, and in some cases even peer into the neutrino fog.
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