{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"bb615c20ece814b1d0e9fa10f9f73389c005ee38a654396d274cbea618b61973","created":"2026-10-03T07:17:52Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"32fb7f19c38e7f115b372c664a15480ef5422277681ff368b1b9380906c05366","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"nuc.double-beta-nme","field":"nuc","n":"1","review_cite":"Agostini, Benato, Detwiler, Menendez, Vissani, Toward the discovery of matter creation with neutrinoless double-beta decay, Reviews of Modern Physics, 2023","review_link":"https://arxiv.org/abs/2202.01787","review_verified":"true","summary":"If neutrinos are their own antiparticles, some nuclei can change two neutrons into two protons while emitting only two electrons. Converting a measured or bounded rate into a neutrino mass needs a nuclear factor, the matrix element, on which theorists disagree by a factor of two to three.","title":"Nuclear matrix elements for neutrinoless double beta decay","topic_ref":null,"why":"The matrix elements set how a discovery or limit in tonne-scale experiments translates into the neutrino mass scale."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"4f4c723b8298474d47f16416d8eb15f7bae4b6a7810849f79c8cbc3d0064c494","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"43db2239bb6a7f70a5f9dda80e59b09572dfde4e2b42dc375052ad7598739333","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"1ku5E7soYyBrT94WJv9TXsClP5e-Xv0hHsop5uAsJjoeZ-y9O9THURxSgV9TCNPaCZwkp-ckzTu4DAIhwgBGAA"},"schema":"pubphys.envelope/1"},"record_hash":"4f4c723b8298474d47f16416d8eb15f7bae4b6a7810849f79c8cbc3d0064c494","leaf_index":281}