{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:HWWLSXHK3FGERKQIM6JYU4MN6P","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":"8f59efa618c1b37dc039f3eae4b4aa71465f96f14f978bb3ac9aeb26b818663e","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-08-22T16:55:59Z","title_canon_sha256":"a7345bae4adcc78fa1de1f332ea03dd41ca72089b53ebacb874bf3e8148f9995"},"schema_version":"1.0","source":{"id":"1608.06224","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.06224","created_at":"2026-05-18T01:01:22Z"},{"alias_kind":"arxiv_version","alias_value":"1608.06224v2","created_at":"2026-05-18T01:01:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.06224","created_at":"2026-05-18T01:01:22Z"},{"alias_kind":"pith_short_12","alias_value":"HWWLSXHK3FGE","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_16","alias_value":"HWWLSXHK3FGERKQI","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_8","alias_value":"HWWLSXHK","created_at":"2026-05-18T12:30:22Z"}],"graph_snapshots":[{"event_id":"sha256:b931747bdb8d9b0e39e1eb6fa8d57693875889f82fced60edf9944e4cf1af60e","target":"graph","created_at":"2026-05-18T01:01:22Z","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":"CP-violating asymmetries in $B \\to \\pi \\pi$ and $B \\to \\rho \\rho$ decays can help specify the weak phase $\\phi_2 = \\alpha$ of the Cabibbo-Kobayashi-% Maskawa (CKM) matrix. We discuss the impact of improved measurements of these processes such as will be available in the near future, finding special value in better measurement of the time-dependent CP violation parameter $S_{00}$ in $B^0 \\to \\pi^0 \\pi^0$ and $B^0 \\to \\rho^0 \\rho^0$. Reducing the errors on $B \\to \\rho \\rho$ measurements by a factor of two can potentially lead to an error in $\\phi_2 = \\alpha$ just above $2^\\circ$, at which level ","authors_text":"Jonathan L. Rosner, Michael Gronau","cross_cats":["hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-08-22T16:55:59Z","title":"Improving the measurement of the CKM phase $\\phi_2 = \\alpha$ in $B \\to \\pi \\pi$ and $B \\to \\rho \\rho$ decays"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.06224","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:f9bf0c42dd08aa160d6a0c772b6f3c07c0dd5a32033f84527b876095c028f69b","target":"record","created_at":"2026-05-18T01:01:22Z","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":"8f59efa618c1b37dc039f3eae4b4aa71465f96f14f978bb3ac9aeb26b818663e","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-08-22T16:55:59Z","title_canon_sha256":"a7345bae4adcc78fa1de1f332ea03dd41ca72089b53ebacb874bf3e8148f9995"},"schema_version":"1.0","source":{"id":"1608.06224","kind":"arxiv","version":2}},"canonical_sha256":"3dacb95cead94c48aa0867938a718df3dd5f972e13d408f77fbd3ac3052748c8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3dacb95cead94c48aa0867938a718df3dd5f972e13d408f77fbd3ac3052748c8","first_computed_at":"2026-05-18T01:01:22.403997Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:01:22.403997Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VZwcqg3neLkdwpfTlE+dyUw191E6ZgoQDTnaIdXINMAP8Av2Si5MMVZbc//hSUnknbVRUaJ5/qpR2p8ouBU1DA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:01:22.404811Z","signed_message":"canonical_sha256_bytes"},"source_id":"1608.06224","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f9bf0c42dd08aa160d6a0c772b6f3c07c0dd5a32033f84527b876095c028f69b","sha256:b931747bdb8d9b0e39e1eb6fa8d57693875889f82fced60edf9944e4cf1af60e"],"state_sha256":"071dd1150512a8aca00e3c781659352e987aa39cf67e32a5108d5d515ad73653"}