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Stearns (5), R. Sutter (2), S. Bart (2), Upton, USA, USA), V. J. Zeps (1) ((1) Carnegie Mellon University","submitted_at":"2007-05-23T09:57:29Z","abstract_excerpt":"We measured the lifetime and the mesonic and non-mesonic decay rates of the 4He-Lambda hypernucleus. The hypernuclei were created using a 750 MeV/c momentum K- beam on a liquid 4He target by the reaction 4He(K-,pi-)4He-Lambda. The 4He-Lambda lifetime was directly measured using protons from Lambda p -> n p non-mesonic decay (also referred to as proton-stimulated decay) and was found to have a value of tau = 245 +/- 24 ps. The mesonic decay rates were determined from the observed numbers of pi-'s and pi0's as Gamma_pi-/Gamma_tot = 0.270 +/- 0.024 and Gamma_pi0/Gamma_tot = 0.564 +/- 0.036, respe"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0705.3311","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"nucl-ex","submitted_at":"2007-05-23T09:57:29Z","cross_cats_sorted":[],"title_canon_sha256":"100055fc579390980209f4157caf723e0bfc3eabb46a290cd77b46a55558cdc4","abstract_canon_sha256":"f32aa82926cb1716f9165a4d78d5dd17d14f8c8ea3b2ccf69702b95e07bda661"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:35:31.094662Z","signature_b64":"B//EjVY+ow0ILaHhFM9jhORem1ffpLpQSgFWcOPJSK1GmgccdBx3oP/Game7MZjNdKdWib7XMqao/0DxM3l7AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c4c9f9dc817806cb6996780cf231bab539246ba7de7ec0edd035576251f17fd8","last_reissued_at":"2026-05-18T02:35:31.094008Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:35:31.094008Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Weak decays of 4He-Lambda","license":"","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"(2) Brookhaven National Laboratory, (3) University of New Mexico, (4) University of Houston, (5) Vassar College, (6) Indiana University Cyclotron Facility, Albuquerque, B. 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