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Lyubushkin","submitted_at":"2017-05-20T13:02:57Z","abstract_excerpt":"We calculate the invariant and helicity amplitudes for the transitions $\\Lambda_b~\\to~\\Lambda^{(\\ast)}(J^P)~+~J/\\psi$ where the $\\Lambda^{(\\ast)}(J^P)$ are $\\Lambda(sud)$-type ground and excited states with $J^P$ quantum numbers $J^P=\\frac12^{\\pm},\\frac32^{\\pm}$. The calculations are performed in the framework of a covariant confined quark model previously developed by us. We find that the values of the helicity amplitudes for the $\\Lambda^\\ast(1520,\\,\\frac32^-)$ and the $\\Lambda^\\ast(1890,\\,\\frac32^+)$ are suppressed compared with those for the ground state $\\Lambda(1116,\\,\\frac12^+)$ and the"},"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":"1705.07299","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2017-05-20T13:02:57Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"03d78522a40719295b508f278ab03fb8da7dd5bc8707fe49758247371b1e1e06","abstract_canon_sha256":"eb0b4b1ec159033022e339979267f1264529aff70ce07d362437b346e0493bbf"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:39:34.912482Z","signature_b64":"GHxXAyj92JAydtBtLWKppm+ex3YACojhOGNWvEfB51bAR1wMjE7RAHR0ujpbU6vnU1XREz3dKJocbN24OSjeCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"420c9ee8a9120f8d1bdf8b21e5a3ea759f38829b598d420372ccbb300c8c40e3","last_reissued_at":"2026-05-18T00:39:34.911868Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:39:34.911868Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Theoretical description of the decays $\\Lambda_b \\to \\Lambda^{(\\ast)}(\\frac12^\\pm,\\frac32^\\pm) + J/\\psi$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"J\\\"urgen G. 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