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These measurements are based on $471\\times 10^6$ $B\\overline{B}$ pairs recorded with the $BABAR$ detector at the SLAC asymmetric $B$ Factory PEP-II. We determine the branching fraction ratios $R^{(*)}_{\\pi^+\\pi^-} = \\mathcal{B}(\\overline{B} \\to D^{(*)} \\pi^+\\pi^- \\ell^- \\overline{\\nu})/\\mathcal{B}(\\overline{B} \\to D^{(*)} \\ell^-\\overline{\\nu})$ using "},"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":"1507.08303","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2015-07-29T20:26:55Z","cross_cats_sorted":[],"title_canon_sha256":"482eeb939d13c4577b2ce469ee2e270550cc9abcbef2e3463a4fc00f3f0661bd","abstract_canon_sha256":"b297cf5d1eb5aa815f3644fcf5a7069560b2ff8a7ba9fa336ccef16ee98ba643"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:21:31.750856Z","signature_b64":"zOO+tbD9g/DMBRTzDPaBoCN5sJyPNoy+woBImsOGqGyXJzmEvGmK1ot3yiB3xakfbME9eahEwCv32hbu9cFwDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2841ae478fb7499ff9e3febdd9133805f060efa6c10564aa3afe3ef1b6e07eb3","last_reissued_at":"2026-05-18T01:21:31.750039Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:21:31.750039Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Observation of $\\overline{B} \\to D^{(*)} \\pi^+\\pi^- \\ell^-\\overline{\\nu}$ decays in $e^+e^-$ collisions at the $\\Upsilon(4S)$ resonance","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"The BABAR Collaboration","submitted_at":"2015-07-29T20:26:55Z","abstract_excerpt":"We report on measurements of the decays of $\\overline{B}$ mesons into the semileptonic final states $\\overline{B} \\to D^{(*)} \\pi^+\\pi^- \\ell^-\\overline{\\nu}$, where $D^{(*)}$ represents a $D$ or $D^*$ meson and $\\ell^-$ is an electron or a muon. 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We determine the branching fraction ratios $R^{(*)}_{\\pi^+\\pi^-} = \\mathcal{B}(\\overline{B} \\to D^{(*)} \\pi^+\\pi^- \\ell^- \\overline{\\nu})/\\mathcal{B}(\\overline{B} \\to D^{(*)} \\ell^-\\overline{\\nu})$ using "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.08303","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1507.08303","created_at":"2026-05-18T01:21:31.750203+00:00"},{"alias_kind":"arxiv_version","alias_value":"1507.08303v1","created_at":"2026-05-18T01:21:31.750203+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.08303","created_at":"2026-05-18T01:21:31.750203+00:00"},{"alias_kind":"pith_short_12","alias_value":"FBA24R4PW5EZ","created_at":"2026-05-18T12:29:19.899920+00:00"},{"alias_kind":"pith_short_16","alias_value":"FBA24R4PW5EZ76PD","created_at":"2026-05-18T12:29:19.899920+00:00"},{"alias_kind":"pith_short_8","alias_value":"FBA24R4P","created_at":"2026-05-18T12:29:19.899920+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2605.03021","citing_title":"Closing the knowledge gap in semileptonic $B\\rightarrow X_c\\ell\\nu$ decays","ref_index":22,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/FBA24R4PW5EZ76PD7265SEZYAX","json":"https://pith.science/pith/FBA24R4PW5EZ76PD7265SEZYAX.json","graph_json":"https://pith.science/api/pith-number/FBA24R4PW5EZ76PD7265SEZYAX/graph.json","events_json":"https://pith.science/api/pith-number/FBA24R4PW5EZ76PD7265SEZYAX/events.json","paper":"https://pith.science/paper/FBA24R4P"},"agent_actions":{"view_html":"https://pith.science/pith/FBA24R4PW5EZ76PD7265SEZYAX","download_json":"https://pith.science/pith/FBA24R4PW5EZ76PD7265SEZYAX.json","view_paper":"https://pith.science/paper/FBA24R4P","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1507.08303&json=true","fetch_graph":"https://pith.science/api/pith-number/FBA24R4PW5EZ76PD7265SEZYAX/graph.json","fetch_events":"https://pith.science/api/pith-number/FBA24R4PW5EZ76PD7265SEZYAX/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FBA24R4PW5EZ76PD7265SEZYAX/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FBA24R4PW5EZ76PD7265SEZYAX/action/storage_attestation","attest_author":"https://pith.science/pith/FBA24R4PW5EZ76PD7265SEZYAX/action/author_attestation","sign_citation":"https://pith.science/pith/FBA24R4PW5EZ76PD7265SEZYAX/action/citation_signature","submit_replication":"https://pith.science/pith/FBA24R4PW5EZ76PD7265SEZYAX/action/replication_record"}},"created_at":"2026-05-18T01:21:31.750203+00:00","updated_at":"2026-05-18T01:21:31.750203+00:00"}