{"paper":{"title":"Dark Matter Interpretation of the Super-Kamiokande Antineutrino Excess in $\\mathrm{U}(1)_{L_\\mu-L_\\tau}$ model","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","hep-ex"],"primary_cat":"hep-ph","authors_text":"Motoi Endo, Tenta Tsuji, Yushi Mura","submitted_at":"2026-05-27T10:20:23Z","abstract_excerpt":"Recent Super-Kamiokande analyses of the diffuse supernova neutrino background, based on data across all SK phases, indicate a mild preference over the zero-DSNB hypothesis at the level of about $2.3\\sigma$ with electron-like antineutrino events at $E_{\\bar{\\nu}_e} \\simeq 20\\,\\mathrm{MeV}$. We investigate whether this excess can be explained by MeV-scale dark matter annihilation into neutrinos in a $\\mathrm{U}(1)_{L_\\mu - L_\\tau}$ model. The dark matter is a Dirac fermion with $m_\\chi \\simeq 22\\,\\mathrm{MeV}$ that annihilates via a light $Z'$ mediator into $\\nu_\\mu \\bar{\\nu}_\\mu$ and $\\nu_\\tau "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.28275","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.28275/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}