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Constraints on metastable superheavy dark matter coupled to sterile neutrinos with the Pierre Auger Observatory
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arxiv 2311.14541 v2 pith:575HBXBK submitted 2023-11-24 hep-ph astro-ph.HE
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abstract
Dark matter particles could be superheavy, provided their lifetime is much longer than the age of the universe. Using the sensitivity of the Pierre Auger Observatory to ultra-high energy neutrinos and photons, we constrain a specific extension of the Standard Model of particle physics that meets the lifetime requirement for a superheavy particle by coupling it to a sector of ultra-light sterile neutrinos. Our results show that, for a typical dark coupling constant of 0.1, the mixing angle $\theta_m$ between active and sterile neutrinos must satisfy, roughly, $\theta_m \lesssim 1.5\times 10^{-6}(M_X/10^9~\mathrm{GeV})^{-2}$ for a mass $M_X$ of the dark-matter particle between $10^8$ and $10^{11}~$GeV.
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Various constraints on BSM physics from extensive air showers and from ultra-high energy gamma-ray and neutrino searches
astro-ph.HE 2025-01 conditional novelty 1.0 of 10
A faithful review of the strongest current bounds on Lorentz violation, superheavy dark matter, cosmic strings, and sterile neutrinos from ultra-high-energy cosmic-ray, gamma-ray, and neutrino searches.
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