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We select a sample of events with one completely reconstructed B- in an hadronic decay mode (B- --> D{(*)0}X- and B- --> J/psi X-). We examine the rest of the event to search for a B+ --> tau+ nu_tau decay. We identify the tau+ lepton in the following modes: tau+ --> e+ nu nu, tau+ --> mu+ nu nu, tau+ --> pi+ nu and tau+ --> rho nu. We find an excess of events with respect to expected background, which excludes the nu"},"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":"1008.0104","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2010-07-31T15:49:40Z","cross_cats_sorted":[],"title_canon_sha256":"797103424c9a4f85ef454daff591ce48054886c99e137d26e468907e6cb93d29","abstract_canon_sha256":"cdaed28dba66120ce4b3742010b2be376329bb2f2aa0ab64da46d047536bb892"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:42:44.069789Z","signature_b64":"VvB53BDZwPBg0IwNMXqHSOVacr1XkqFUH4R9f2RudECyOHmCaFSoHHPYQSMWxVVdf7GqH6SkIAPaSO+WGenmDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"65d1f9f68e23967b9c1f84021ed93ed464e3d76bec5cae30673b5bfd24f505a5","last_reissued_at":"2026-05-18T04:42:44.069278Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:42:44.069278Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Evidence for B+ --> tau+ nu_tau decays using hadronic B tags","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"et al, P. Del Amo Sanchez, The BABAR Collaboration","submitted_at":"2010-07-31T15:49:40Z","abstract_excerpt":"We present a search for the decay B+ --> tau+ nu_tau using 467.8 x 10^6 B B-bar pairs collected at the Upsilon(4S) resonance with the BABAR detector at the SLAC PEP-II B-Factory. We select a sample of events with one completely reconstructed B- in an hadronic decay mode (B- --> D{(*)0}X- and B- --> J/psi X-). We examine the rest of the event to search for a B+ --> tau+ nu_tau decay. We identify the tau+ lepton in the following modes: tau+ --> e+ nu nu, tau+ --> mu+ nu nu, tau+ --> pi+ nu and tau+ --> rho nu. 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