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Previously our measurements were substantially higher than the most precise lattice based QCD calculation of (241 +/- 3) MeV. Here we use the D_s^+ --> ell^+ nu channel, where the ell^+ designates either a mu^+ or a tau^+, when the tau^+ --> pi^+ anti-nu. Analyzing both modes independently, we determine B(D_s^+ --> mu^+ nu)= 0.565 +/- 0.045 +/- 0.017)%, and B(D_s^+ --> mu^+ nu)= (6.42 +/- 0.81 +/- 0.18)%. We also analyze them simu"},"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":"0901.1216","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2009-01-09T16:48:10Z","cross_cats_sorted":[],"title_canon_sha256":"7c310ecfae6d42a9a9abf7fccf6cc6354dce36869ef95134ae8dacb392aee162","abstract_canon_sha256":"75707269cdac7a0d18feb07081ca042b8a6232a9b1dd36a6084b3e9cd825ad75"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:25:49.283112Z","signature_b64":"c6rG+JfsoYofJFT+oB8C+jI+doDjHlFz+Lwll10TDhi6oUwQswVbWRv7r5E8vyyNuUTfQCsZ32qXLLtBiCXDAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1002ffb6410d2d5d3e333a1e07afeac93b256181cfa3aeaacd51a968d8cf7545","last_reissued_at":"2026-07-04T17:25:49.282745Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:25:49.282745Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Measurement of B(Ds+ -->ell+ nu) and the Decay Constant fDs From 600/pb of e+e- Annihilation Data Near 4170 MeV","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"CLEO Collaboration: J. 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