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By examining the decay rates as functions of the four-momentum transfer squared, q^2, we measure the ratio [dB/dq^2(Ds+ -> f0(980) e+ nu) B(f0 -> pi+pi-)]/[dB/dq^2(Ds+ -> phi e+ nu)B(phi -> K+K-)] at q^2 of zero to be (42 +/- 11)%. This ratio has been predicted to equal the rate ratio [B(Bs -> J/psi f_0)B(f0 -> pi+pi-)]/[B(Bs -> J/psi phi)B(phi -> K+K-)], thus indicating that the CP eigenstate J/psi f0 could be"},"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":"0907.3201","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2009-07-18T10:47:06Z","cross_cats_sorted":[],"title_canon_sha256":"745dc64667d6ca357140e5584e95504fd26f5766c5dfa10a3f33fd08c76ea873","abstract_canon_sha256":"28cc2971936bfbc9075d0539d21ec741993b96eb4295c7298d7b915d2f28a055"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:25:49.979765Z","signature_b64":"onkg8k9TYMcLCfFbOlBRFsAHvt53LTWXnYL7Tto+w7718P1nVJ+diQ1+WBiH6foXeL4YJNNHQMS43UdKnfRBBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"36f8fb5c7f09dcd456ea65f168defdf9af59c038d6e6147c6bc791242512a936","last_reissued_at":"2026-07-04T17:25:49.979336Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:25:49.979336Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Study of the semileptonic decay Ds+ -> f0(980) e+ nu and implications for Bs -> J/psi f0","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"CLEO Collaboration: K. 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