{"paper":{"title":"Sensitivity of neutrinoless double beta decays from a combined analysis of ground and excited states","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Combined analysis of neutrinoless double-beta decays to ground and excited states can significantly enhance experimental sensitivity.","cross_cats":["hep-ex","nucl-ex","nucl-th"],"primary_cat":"hep-ph","authors_text":"C. R. Ding, J. M. Yao, K. Han, S.B. Wang","submitted_at":"2025-08-24T15:36:05Z","abstract_excerpt":"Next-generation neutrinoless double-beta ($0\\nu\\beta\\beta$) decay experiments, with projected half-life sensitivities approaching $10^{28}$ years, aim to probe the entire parameter space of the inverted neutrino mass ordering in the light-neutrino-exchange scenario. However, this reach remains uncertain by the substantial model dependence of the nuclear matrix elements (NMEs). In this work, we propose a strategy based on a combined analysis of $0\\nu\\beta\\beta$ decays to both the ground state and the first excited $0^+$ state of the daughter nucleus. We show that such a multi-channel approach c"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"We show that such a multi-channel approach can significantly enhance experimental sensitivity, depending on the underlying NME predictions.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The enhancement assumes that nuclear matrix elements for ground-state and excited 0+ transitions differ enough to supply independent information and that detectors can efficiently tag the excited-state transitions in 136Xe.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Combined analysis of 0νββ decays to ground and excited states can significantly enhance experimental sensitivity depending on NME predictions.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Combined analysis of neutrinoless double-beta decays to ground and excited states can significantly enhance experimental sensitivity.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"7ff3c44b66d93c75f2abbc92d748df4b0bf223c6ec12645f965a46a124a30251"},"source":{"id":"2508.17413","kind":"arxiv","version":3},"verdict":{"id":"c1eb4676-d853-44f6-b273-665f56026685","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-18T21:20:11.761125Z","strongest_claim":"We show that such a multi-channel approach can significantly enhance experimental sensitivity, depending on the underlying NME predictions.","one_line_summary":"Combined analysis of 0νββ decays to ground and excited states can significantly enhance experimental sensitivity depending on NME predictions.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The enhancement assumes that nuclear matrix elements for ground-state and excited 0+ transitions differ enough to supply independent information and that detectors can efficiently tag the excited-state transitions in 136Xe.","pith_extraction_headline":"Combined analysis of neutrinoless double-beta decays to ground and excited states can significantly enhance experimental sensitivity."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2508.17413/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":2,"snapshot_sha256":"e3e1f71b93ec82b5b9cd78d3d748f47f22a1fa60d14e33624bb7b1a418451f0c"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}