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Relaxing constraints on a broad dark photon

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arxiv 2505.03241 v2 pith:ZLVL66YX submitted 2025-05-06 hep-ph hep-ex

Relaxing constraints on a broad dark photon

classification hep-ph hep-ex
keywords darkphotonconstraintslimitsmattermixingparameterbound
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We revisit the exclusion constraints on the parameters of a narrow dark photon set by direct experimental searches. We investigate how a dark photon with a larger decay width impacts these limits, in particular, in the case where the dark photon also decays into light dark matter. As an example, taking the upper limits on the mixing parameter, $\epsilon$, reported by the CMS collaboration, we find that they could be significantly relaxed. Indeed, even a very modest coupling of the dark photon to dark matter can lead to an increase in the bound on the mixing parameter by an order of magnitude.

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Cited by 3 Pith papers

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

  1. Relaxed constraints for dark matter with axial coupling to a dark photon

    hep-ph 2025-10 conditional novelty 5.0

    Axial coupling of Dirac dark matter to a kinetically-mixed dark photon suppresses the standard direct-detection signal and opens large allowed regions in the WIMP parameter space.

  2. GeV-scale thermal dark matter from dark photons: tightly constrained, yet allowed

    hep-ph 2025-07 conditional novelty 5.0

    In a dark-photon-mediated Dirac fermionic DM model, only narrow resonant regions with small dark-sector coupling allow the candidate to saturate the full relic density while evading current direct and indirect detecti...

  3. WIMP Dark Matter within the dark photon portal

    hep-ph 2025-08 unverdicted novelty 3.0

    Derives lower limits on dark photon parameters from thermal relic density for Dirac fermion and complex scalar WIMPs and compares resulting spin-independent cross sections to direct detection upper bounds.