{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:SPSJRBXVFQB74I34KCODRVCFMY","short_pith_number":"pith:SPSJRBXV","schema_version":"1.0","canonical_sha256":"93e49886f52c03fe237c509c38d445661965278e8b9ab7d8f8ed94dbd267ca4b","source":{"kind":"arxiv","id":"1506.05845","version":2},"attestation_state":"computed","paper":{"title":"Improved measurement of the $\\pi \\rightarrow \\mbox{e} \\nu$ branching ratio","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A.Aguilar-Arevalo, A. Hussein, A. Sher, C. Malbrunot, D.A. Bryman, D.I. Britton, D. Protopopescu, D. Vavilov, D. vom Bruch, J. Comfort, K. Yamada, L. Doria, L. Kurchaninov, L.S. Littenberg, M. Aoki, M. Blecher, M. Ding, P. Gumplinger, R.E. Mischke, S. Chen, S. Cuen-Rochin, S.H. Kettell, S. Ito, T. Numao, T. Sullivan, Y. Igarashi","submitted_at":"2015-06-18T22:48:18Z","abstract_excerpt":"A new measurement of the branching ratio, $R_{e/\\mu} =\\Gamma (\\pi^+ \\rightarrow \\mbox{e}^+ \\nu + \\pi^+ \\rightarrow \\mbox{e}^+ \\nu \\gamma)/ \\Gamma (\\pi^+ \\rightarrow \\mu^+ \\nu + \\pi^+ \\rightarrow \\mu^+ \\nu \\gamma)$, resulted in $R_{e/\\mu}^{exp} = (1.2344 \\pm 0.0023 (stat) \\pm 0.0019 (syst)) \\times 10^{-4}$. This is in agreement with the standard model prediction and improves the test of electron-muon universality to the level of 0.1 %."},"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":"1506.05845","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2015-06-18T22:48:18Z","cross_cats_sorted":[],"title_canon_sha256":"1bcd6acc80511839066713c5b39535a8c3d72b30a10eafeaf9efb63fa641104d","abstract_canon_sha256":"ad585424c025e7c8d9f5637db4dd04e64fdb105d4a4245acf8deaa03914ed0c3"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:35:04.593893Z","signature_b64":"bFFklq44dcqa2DbfSfuPHQv2VwTnp0fhhnGVIw+NukCaiWy1KERyz+jNVzFcpgkzBpspWTwHtMivhcUn4rWFDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"93e49886f52c03fe237c509c38d445661965278e8b9ab7d8f8ed94dbd267ca4b","last_reissued_at":"2026-05-18T01:35:04.593370Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:35:04.593370Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Improved measurement of the $\\pi \\rightarrow \\mbox{e} \\nu$ branching ratio","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A.Aguilar-Arevalo, A. Hussein, A. Sher, C. Malbrunot, D.A. Bryman, D.I. Britton, D. Protopopescu, D. Vavilov, D. vom Bruch, J. Comfort, K. Yamada, L. Doria, L. Kurchaninov, L.S. Littenberg, M. Aoki, M. Blecher, M. Ding, P. Gumplinger, R.E. Mischke, S. Chen, S. Cuen-Rochin, S.H. Kettell, S. Ito, T. Numao, T. Sullivan, Y. Igarashi","submitted_at":"2015-06-18T22:48:18Z","abstract_excerpt":"A new measurement of the branching ratio, $R_{e/\\mu} =\\Gamma (\\pi^+ \\rightarrow \\mbox{e}^+ \\nu + \\pi^+ \\rightarrow \\mbox{e}^+ \\nu \\gamma)/ \\Gamma (\\pi^+ \\rightarrow \\mu^+ \\nu + \\pi^+ \\rightarrow \\mu^+ \\nu \\gamma)$, resulted in $R_{e/\\mu}^{exp} = (1.2344 \\pm 0.0023 (stat) \\pm 0.0019 (syst)) \\times 10^{-4}$. This is in agreement with the standard model prediction and improves the test of electron-muon universality to the level of 0.1 %."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.05845","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":""},"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":"1506.05845","created_at":"2026-05-18T01:35:04.593451+00:00"},{"alias_kind":"arxiv_version","alias_value":"1506.05845v2","created_at":"2026-05-18T01:35:04.593451+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.05845","created_at":"2026-05-18T01:35:04.593451+00:00"},{"alias_kind":"pith_short_12","alias_value":"SPSJRBXVFQB7","created_at":"2026-05-18T12:29:42.218222+00:00"},{"alias_kind":"pith_short_16","alias_value":"SPSJRBXVFQB74I34","created_at":"2026-05-18T12:29:42.218222+00:00"},{"alias_kind":"pith_short_8","alias_value":"SPSJRBXV","created_at":"2026-05-18T12:29:42.218222+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":2,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"1907.05158","citing_title":"Flavour anomalies and (fundamental) partial compositeness","ref_index":56,"is_internal_anchor":true},{"citing_arxiv_id":"2605.06560","citing_title":"$F_K/F_\\pi$ as a precision test of a new four flavor Domain Wall Fermion action","ref_index":69,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/SPSJRBXVFQB74I34KCODRVCFMY","json":"https://pith.science/pith/SPSJRBXVFQB74I34KCODRVCFMY.json","graph_json":"https://pith.science/api/pith-number/SPSJRBXVFQB74I34KCODRVCFMY/graph.json","events_json":"https://pith.science/api/pith-number/SPSJRBXVFQB74I34KCODRVCFMY/events.json","paper":"https://pith.science/paper/SPSJRBXV"},"agent_actions":{"view_html":"https://pith.science/pith/SPSJRBXVFQB74I34KCODRVCFMY","download_json":"https://pith.science/pith/SPSJRBXVFQB74I34KCODRVCFMY.json","view_paper":"https://pith.science/paper/SPSJRBXV","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1506.05845&json=true","fetch_graph":"https://pith.science/api/pith-number/SPSJRBXVFQB74I34KCODRVCFMY/graph.json","fetch_events":"https://pith.science/api/pith-number/SPSJRBXVFQB74I34KCODRVCFMY/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/SPSJRBXVFQB74I34KCODRVCFMY/action/timestamp_anchor","attest_storage":"https://pith.science/pith/SPSJRBXVFQB74I34KCODRVCFMY/action/storage_attestation","attest_author":"https://pith.science/pith/SPSJRBXVFQB74I34KCODRVCFMY/action/author_attestation","sign_citation":"https://pith.science/pith/SPSJRBXVFQB74I34KCODRVCFMY/action/citation_signature","submit_replication":"https://pith.science/pith/SPSJRBXVFQB74I34KCODRVCFMY/action/replication_record"}},"created_at":"2026-05-18T01:35:04.593451+00:00","updated_at":"2026-05-18T01:35:04.593451+00:00"}