{"paper":{"title":"Muon Nuclear Data Development Project","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Japan launches the Muon Nuclear Data project to build the first dedicated library for muon capture reactions.","cross_cats":["nucl-th"],"primary_cat":"nucl-ex","authors_text":"Adrian Hillier, Dai Tomono, Futoshi Minato, Hiroki Iwamoto, Megumi Niikura, Naritoshi Kawamura, Rurie Mizuno, Sayani Biswas, Shinichiro Abe, Shoichiro Kawase, Teiichiro Matsuzaki, Yuji Yamaguchi, Yukinobu Watanabe","submitted_at":"2026-05-15T02:21:34Z","abstract_excerpt":"Negative muon-induced nuclear reactions play a critical role in a wide range of scientific and technological applications; however, comprehensive nuclear data for these processes remain unavailable. To address this gap, we have launched the Muon Nuclear Data (muND) Development Project in Japan, aiming to construct a dedicated data library for muon capture reactions. The library consists of four sub-libraries: muonic X-ray energies and intensities (XR), lifetimes of muonic atoms and nuclear capture rates (LT), energy spectra of emitted particles (ES), and production branching ratios of residual"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"To address this gap, we have launched the Muon Nuclear Data (muND) Development Project in Japan, aiming to construct a dedicated data library for muon capture reactions. 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If this integration fails to produce reliable evaluated data, the central goal of filling the nuclear data gap would not be met.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"The Muon Nuclear Data (muND) Development Project has been initiated to compile and evaluate data for muon capture reactions across four sub-libraries using experiments, theory, and machine learning.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Japan launches the Muon Nuclear Data project to build the first dedicated library for muon capture reactions.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"8ceb40f830f6bccd69b4d26ae314ad65c44758423f1996b2df42f7c4f8ef26f8"},"source":{"id":"2605.15539","kind":"arxiv","version":1},"verdict":{"id":"3d0d2ddb-a3dd-4efb-b6ed-a7c243140f07","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-19T14:26:02.154111Z","strongest_claim":"To address this gap, we have launched the Muon Nuclear Data (muND) Development Project in Japan, aiming to construct a dedicated data library for muon capture reactions. 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