{"paper":{"title":"The X17 Existence Hinted at by Nuclear Reactor Neutrinos","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Reactor neutrino scattering data supports the existence of the X17 particle","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Else Lytken, Joakim Cederk\\\"all, Johan Rathsman, Stefano Moretti, Yasar Hicyilmaz","submitted_at":"2026-05-11T15:02:49Z","abstract_excerpt":"We show that by exploiting the process of Coherent Elastic neutrino (v) Nucleus Scattering (CEvNS), neutrino measurements by nuclear reactor experiments appear to corroborate the evidence of the so-called X17 particle, which has been invoked to explain the ATOMKI anomaly. We base our analysis primarily on CONUS+ and Dresden-II data, which, when combined with CEvNS data from COHERENT and neutrino oscillation data from IceCube, single out a unique region of couplings to neutrinos and nuclei."},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"We show how, by exploiting the process of Coherent Elastic neutrino Nucleus Scattering (CEvNS), neutrinos produced by nuclear reactor experiments appear to corroborate the evidence of the so-called X17 particle, which has been invoked to explain the ATOMKI anomaly. ... single out a unique region of couplings to neutrinos and nuclei.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That any deviations or signals in the CONUS+ and Dresden-II CEvNS data are attributable to X17 exchange rather than unaccounted systematics, backgrounds, or other new physics, and that the datasets can be combined without significant tension.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Reactor neutrino CEvNS data corroborates the X17 particle by constraining its neutrino and nuclear couplings to a unique region when combined with other neutrino measurements.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Reactor neutrino scattering data supports the existence of the X17 particle","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"48621c6449a0794bc3dae7079c4a0426e5a5d18c4c30fc96b447765556b393c9"},"source":{"id":"2605.10689","kind":"arxiv","version":2},"verdict":{"id":"bdd512b0-fff7-49ae-9821-c7ab4bb802e4","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-12T04:10:28.586345Z","strongest_claim":"We show how, by exploiting the process of Coherent Elastic neutrino Nucleus Scattering (CEvNS), neutrinos produced by nuclear reactor experiments appear to corroborate the evidence of the so-called X17 particle, which has been invoked to explain the ATOMKI anomaly. ... single out a unique region of couplings to neutrinos and nuclei.","one_line_summary":"Reactor neutrino CEvNS data corroborates the X17 particle by constraining its neutrino and nuclear couplings to a unique region when combined with other neutrino measurements.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That any deviations or signals in the CONUS+ and Dresden-II CEvNS data are attributable to X17 exchange rather than unaccounted systematics, backgrounds, or other new physics, and that the datasets can be combined without significant tension.","pith_extraction_headline":"Reactor neutrino scattering data supports the existence of the X17 particle"},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.10689/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"claim_evidence","ran_at":"2026-05-20T05:22:00.465111Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"ai_meta_artifact","ran_at":"2026-05-19T14:38:08.671220Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_title_agreement","ran_at":"2026-05-19T11:01:17.121387Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-19T09:03:59.073797Z","status":"completed","version":"1.0.0","findings_count":0}],"snapshot_sha256":"050e514d7337a51f7f9ea8ec889d229b53341c95fbfc911c948e8409cf29eb32"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":2,"snapshot_sha256":"79b6a5a6a2f4239a78c1a1aecdfbf431c6d137acbb24ab494643e2ed83ad4f59"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}