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We obtain\n  B(D^+_s to tau^+ nu_tau) = (5.30 +- 0.47 +- 0.22) % and determine the decay constant f_Ds = (252.5 +- 11.1 +- 5.2) MeV, where the first uncertainties are statistical and the second are systematic."},"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":"0901.1147","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2009-01-09T14:58:32Z","cross_cats_sorted":[],"title_canon_sha256":"18feb6f3c4a0489a00f17fd7665808363022c25e42b34f80f6c5e07d0decbd0b","abstract_canon_sha256":"99899eecf9fa6873cc81fd20c58d6e1c9c6da1111a3afe701c4f02f7df96aa57"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:25:49.267184Z","signature_b64":"YkVENbkHtB1CxKjLgPLoSbBiYgfYjI3aCIYdqV9IzoiL7/+eZTPjGe42fToy5ET8RWpRiSJQEd8KkcDL9xkfBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b8bf34bf8f4b1d2395e23aa5189e9f902ce18069b7e279838ec48424db4cbb36","last_reissued_at":"2026-07-04T17:25:49.266809Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:25:49.266809Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Improved Measurement of Absolute Branching Fraction of Ds to tau nu","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"CLEO Collaboration: P.U.E. Onyisi, et al","submitted_at":"2009-01-09T14:58:32Z","abstract_excerpt":"We have studied the leptonic decay D^+_s to tau^+ nu_tau, via the decay channel tau^+ to e^+ nu_e anti-nu_tau, using a sample of tagged D_s^+ decays collected near the D^*_s D_s peak production energy in e^+ e^- collisions with the CLEO-c detector. 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