{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:JPB3KSL2TU4ZXTSELJJWFGPNED","short_pith_number":"pith:JPB3KSL2","schema_version":"1.0","canonical_sha256":"4bc3b5497a9d399bce445a536299ed20f6656de96becb71cced42c818c31fefe","source":{"kind":"arxiv","id":"1909.02519","version":2},"attestation_state":"computed","paper":{"title":"With or without U(2)? Probing non-standard flavor and helicity structures in semileptonic B decays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Gino Isidori, Javier Fuentes-Mart\\'in, Julie Pag\\`es, Kei Yamamoto","submitted_at":"2019-09-05T16:42:37Z","abstract_excerpt":"Motivated by the recent hints of lepton flavor universality violation observed in semileptonic $B$ decays, we analyze how to test flavor and helicity structures of the corresponding amplitudes in view of future data. We show that the general assumption that such non-standard effects are controlled by a $U(2)_q \\times U(2)_\\ell$ flavor symmetry, minimally broken as in the Standard Model Yukawa sector, leads to stringent predictions on leptonic and semileptonic $B$ decays. Future measurements of $R_{D^{(*)}}$, $R_{K^{(*)}}$, ${\\mathcal B}(\\bar B_{c,u}\\to \\ell \\bar \\nu)$, ${\\mathcal B}(\\bar B \\to"},"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":"1909.02519","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2019-09-05T16:42:37Z","cross_cats_sorted":[],"title_canon_sha256":"cc5b0cc86828b6046380ed386d9c6cebb17df9090957eb9f37e50b710d253a71","abstract_canon_sha256":"f7e7cc43da8d5f6a6c4266a0cd4efb84148fff7e1eb08d2964cef00f6e70f44e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:20:31.829168Z","signature_b64":"ZSG5LZShj2VJHAZQvRZcjs3SSLGocQmCFRo03SckDt98ZJzh+h4fn9lulcv10Onhtj3dxAHSQ4QPHMjzjIrbDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4bc3b5497a9d399bce445a536299ed20f6656de96becb71cced42c818c31fefe","last_reissued_at":"2026-07-05T00:20:31.828762Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:20:31.828762Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"With or without U(2)? Probing non-standard flavor and helicity structures in semileptonic B decays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Gino Isidori, Javier Fuentes-Mart\\'in, Julie Pag\\`es, Kei Yamamoto","submitted_at":"2019-09-05T16:42:37Z","abstract_excerpt":"Motivated by the recent hints of lepton flavor universality violation observed in semileptonic $B$ decays, we analyze how to test flavor and helicity structures of the corresponding amplitudes in view of future data. We show that the general assumption that such non-standard effects are controlled by a $U(2)_q \\times U(2)_\\ell$ flavor symmetry, minimally broken as in the Standard Model Yukawa sector, leads to stringent predictions on leptonic and semileptonic $B$ decays. Future measurements of $R_{D^{(*)}}$, $R_{K^{(*)}}$, ${\\mathcal B}(\\bar B_{c,u}\\to \\ell \\bar \\nu)$, ${\\mathcal B}(\\bar B \\to"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.02519","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1909.02519/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"1909.02519","created_at":"2026-07-05T00:20:31.828814+00:00"},{"alias_kind":"arxiv_version","alias_value":"1909.02519v2","created_at":"2026-07-05T00:20:31.828814+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.02519","created_at":"2026-07-05T00:20:31.828814+00:00"},{"alias_kind":"pith_short_12","alias_value":"JPB3KSL2TU4Z","created_at":"2026-07-05T00:20:31.828814+00:00"},{"alias_kind":"pith_short_16","alias_value":"JPB3KSL2TU4ZXTSE","created_at":"2026-07-05T00:20:31.828814+00:00"},{"alias_kind":"pith_short_8","alias_value":"JPB3KSL2","created_at":"2026-07-05T00:20:31.828814+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":3,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2510.03403","citing_title":"Flavor hierarchies with nonminimal irreducible representations","ref_index":16,"is_internal_anchor":false},{"citing_arxiv_id":"2605.20332","citing_title":"Cosmological History of Flavour Deconstruction Models: Constraints from Monopole Production","ref_index":14,"is_internal_anchor":false},{"citing_arxiv_id":"2605.15267","citing_title":"Hierarchies from Higher Flavor Spin","ref_index":29,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/JPB3KSL2TU4ZXTSELJJWFGPNED","json":"https://pith.science/pith/JPB3KSL2TU4ZXTSELJJWFGPNED.json","graph_json":"https://pith.science/api/pith-number/JPB3KSL2TU4ZXTSELJJWFGPNED/graph.json","events_json":"https://pith.science/api/pith-number/JPB3KSL2TU4ZXTSELJJWFGPNED/events.json","paper":"https://pith.science/paper/JPB3KSL2"},"agent_actions":{"view_html":"https://pith.science/pith/JPB3KSL2TU4ZXTSELJJWFGPNED","download_json":"https://pith.science/pith/JPB3KSL2TU4ZXTSELJJWFGPNED.json","view_paper":"https://pith.science/paper/JPB3KSL2","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1909.02519&json=true","fetch_graph":"https://pith.science/api/pith-number/JPB3KSL2TU4ZXTSELJJWFGPNED/graph.json","fetch_events":"https://pith.science/api/pith-number/JPB3KSL2TU4ZXTSELJJWFGPNED/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/JPB3KSL2TU4ZXTSELJJWFGPNED/action/timestamp_anchor","attest_storage":"https://pith.science/pith/JPB3KSL2TU4ZXTSELJJWFGPNED/action/storage_attestation","attest_author":"https://pith.science/pith/JPB3KSL2TU4ZXTSELJJWFGPNED/action/author_attestation","sign_citation":"https://pith.science/pith/JPB3KSL2TU4ZXTSELJJWFGPNED/action/citation_signature","submit_replication":"https://pith.science/pith/JPB3KSL2TU4ZXTSELJJWFGPNED/action/replication_record"}},"created_at":"2026-07-05T00:20:31.828814+00:00","updated_at":"2026-07-05T00:20:31.828814+00:00"}