{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:UKUJSZRHRE3BJZNIJVQ3UISK4W","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"cb6bf91d830db8884e5b2455649046644a636f3fec93d09177e4e1c6f3d118a9","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-07-01T02:19:49Z","title_canon_sha256":"e97f758e59655cd90b3d60deb2428ba86b4835dac9f0b85cdc719ea5f9779c04"},"schema_version":"1.0","source":{"id":"1807.00256","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.00256","created_at":"2026-05-18T00:06:59Z"},{"alias_kind":"arxiv_version","alias_value":"1807.00256v2","created_at":"2026-05-18T00:06:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.00256","created_at":"2026-05-18T00:06:59Z"},{"alias_kind":"pith_short_12","alias_value":"UKUJSZRHRE3B","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"UKUJSZRHRE3BJZNI","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"UKUJSZRH","created_at":"2026-05-18T12:32:56Z"}],"graph_snapshots":[{"event_id":"sha256:ec0069bdfeebb4b410f4cfe289b62bf8b2e6b0a5733e507ff62f991c4fbdc96e","target":"graph","created_at":"2026-05-18T00:06:59Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"A number of recent experimental measurements suggest the possibility of a breakdown of lepton ($\\ell$) universality in exclusive $b \\to c \\ell \\nu_\\ell$ semileptonic meson decays. We analyze the full differential decay rates for several such processes, and show how to extract combinations of the underlying helicity amplitudes that are completely independent of $m_\\ell$. Ratios of these combinations for different $\\ell$ (as well as some combinations for a single value of $\\ell$) therefore equal unity in the Standard Model and provide stringent tests of lepton universality. Furthermore, the extr","authors_text":"Henry Lamm, Richard F. Lebed, Thomas D. Cohen","cross_cats":["hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-07-01T02:19:49Z","title":"Tests of the Standard Model in $B \\to D\\ell \\nu_\\ell$, $B \\to D^* \\ell \\nu_\\ell$ and $B_c \\to J/\\psi \\, \\ell \\nu_\\ell$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.00256","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:8d780e024cb9ccaa006e56322452faddd96cd355b4f99a73f2b3a1980e35ed78","target":"record","created_at":"2026-05-18T00:06:59Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"cb6bf91d830db8884e5b2455649046644a636f3fec93d09177e4e1c6f3d118a9","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-07-01T02:19:49Z","title_canon_sha256":"e97f758e59655cd90b3d60deb2428ba86b4835dac9f0b85cdc719ea5f9779c04"},"schema_version":"1.0","source":{"id":"1807.00256","kind":"arxiv","version":2}},"canonical_sha256":"a2a8996627893614e5a84d61ba224ae5b3dba4e75d5cc9073fae3d8be0a9d665","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a2a8996627893614e5a84d61ba224ae5b3dba4e75d5cc9073fae3d8be0a9d665","first_computed_at":"2026-05-18T00:06:59.229000Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:06:59.229000Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9JYJ+alG6Y2rdcV+CsTbFTVAhVVSeoHSekAwAdpberkCLWTNbiCCnkKVICFm/H/FgLbwqmFYLQEFnpxamDpJBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:06:59.229675Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.00256","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8d780e024cb9ccaa006e56322452faddd96cd355b4f99a73f2b3a1980e35ed78","sha256:ec0069bdfeebb4b410f4cfe289b62bf8b2e6b0a5733e507ff62f991c4fbdc96e"],"state_sha256":"af23d49ef394569df64875211208ef21f8f1cc7fc30ff5772bf8eecffa798d5b"}