{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:N4YN3NO7LV3D2XFKSZ4X2TWM7L","short_pith_number":"pith:N4YN3NO7","canonical_record":{"source":{"id":"1202.2426","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-02-11T10:03:57Z","cross_cats_sorted":[],"title_canon_sha256":"97aed4ddf31c0c814982b5cd238ea154a4b2c24982dcfc4d7cfe2b1b61b4b748","abstract_canon_sha256":"ecc0ded52edf43151be4667998f6d1378840d67373920b11acc2526474340b33"},"schema_version":"1.0"},"canonical_sha256":"6f30ddb5df5d763d5caa96797d4eccfac6c7eac68727570188f48968491d681b","source":{"kind":"arxiv","id":"1202.2426","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.2426","created_at":"2026-05-18T04:02:26Z"},{"alias_kind":"arxiv_version","alias_value":"1202.2426v1","created_at":"2026-05-18T04:02:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.2426","created_at":"2026-05-18T04:02:26Z"},{"alias_kind":"pith_short_12","alias_value":"N4YN3NO7LV3D","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"N4YN3NO7LV3D2XFK","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"N4YN3NO7","created_at":"2026-05-18T12:27:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:N4YN3NO7LV3D2XFKSZ4X2TWM7L","target":"record","payload":{"canonical_record":{"source":{"id":"1202.2426","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-02-11T10:03:57Z","cross_cats_sorted":[],"title_canon_sha256":"97aed4ddf31c0c814982b5cd238ea154a4b2c24982dcfc4d7cfe2b1b61b4b748","abstract_canon_sha256":"ecc0ded52edf43151be4667998f6d1378840d67373920b11acc2526474340b33"},"schema_version":"1.0"},"canonical_sha256":"6f30ddb5df5d763d5caa96797d4eccfac6c7eac68727570188f48968491d681b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:02:26.563944Z","signature_b64":"W46SC82pQDtdy5n4wWfq7nHrD/UnEMypbjW+/83tPnr8LfupGnlZWB8m+e0EsC1g6DmmbEf56S6Zf+iJrx2qBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6f30ddb5df5d763d5caa96797d4eccfac6c7eac68727570188f48968491d681b","last_reissued_at":"2026-05-18T04:02:26.563481Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:02:26.563481Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1202.2426","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:02:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JPd3btLq8OdersmmaNDRgN7dFeyO0JhgKIuOHiUysEOyGWwU7196mnic2IZ09EdWIXz9im8+PYdaqBrsqMc9Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T06:33:54.468610Z"},"content_sha256":"bab79c3cace1552c9832f0cb31591c45c04f36c08a36f35efa78cf0cb9501304","schema_version":"1.0","event_id":"sha256:bab79c3cace1552c9832f0cb31591c45c04f36c08a36f35efa78cf0cb9501304"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:N4YN3NO7LV3D2XFKSZ4X2TWM7L","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Massive particles and unitarity cuts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Edoardo Mirabella, Ruth Britto","submitted_at":"2012-02-11T10:03:57Z","abstract_excerpt":"We present an extension of the spinor integration formalism of one loop amplitudes from the double-cut to the single-cut case. This technique can be applied for the computation of the tadpole coefficients. Moreover we describe an off-shell continuation of one loop amplitudes that allows a finite evaluation of the unitarity cuts in the channel of a single massive external fermion."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.2426","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:02:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tTVs/XCIapQ/PnnfY1zoKmbZD6Iq5b76XIqaI6JoDb7UjX5ghcFVaxlhuZrpdGqTSXBDS72RCiCJwAN7Rz0qAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T06:33:54.469148Z"},"content_sha256":"0ab575c3b769589999d42daf90b406fc86d79eb71c6bca1b101889353794ac0a","schema_version":"1.0","event_id":"sha256:0ab575c3b769589999d42daf90b406fc86d79eb71c6bca1b101889353794ac0a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/N4YN3NO7LV3D2XFKSZ4X2TWM7L/bundle.json","state_url":"https://pith.science/pith/N4YN3NO7LV3D2XFKSZ4X2TWM7L/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/N4YN3NO7LV3D2XFKSZ4X2TWM7L/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-31T06:33:54Z","links":{"resolver":"https://pith.science/pith/N4YN3NO7LV3D2XFKSZ4X2TWM7L","bundle":"https://pith.science/pith/N4YN3NO7LV3D2XFKSZ4X2TWM7L/bundle.json","state":"https://pith.science/pith/N4YN3NO7LV3D2XFKSZ4X2TWM7L/state.json","well_known_bundle":"https://pith.science/.well-known/pith/N4YN3NO7LV3D2XFKSZ4X2TWM7L/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:N4YN3NO7LV3D2XFKSZ4X2TWM7L","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":"ecc0ded52edf43151be4667998f6d1378840d67373920b11acc2526474340b33","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-02-11T10:03:57Z","title_canon_sha256":"97aed4ddf31c0c814982b5cd238ea154a4b2c24982dcfc4d7cfe2b1b61b4b748"},"schema_version":"1.0","source":{"id":"1202.2426","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.2426","created_at":"2026-05-18T04:02:26Z"},{"alias_kind":"arxiv_version","alias_value":"1202.2426v1","created_at":"2026-05-18T04:02:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.2426","created_at":"2026-05-18T04:02:26Z"},{"alias_kind":"pith_short_12","alias_value":"N4YN3NO7LV3D","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"N4YN3NO7LV3D2XFK","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"N4YN3NO7","created_at":"2026-05-18T12:27:16Z"}],"graph_snapshots":[{"event_id":"sha256:0ab575c3b769589999d42daf90b406fc86d79eb71c6bca1b101889353794ac0a","target":"graph","created_at":"2026-05-18T04:02:26Z","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":"We present an extension of the spinor integration formalism of one loop amplitudes from the double-cut to the single-cut case. This technique can be applied for the computation of the tadpole coefficients. Moreover we describe an off-shell continuation of one loop amplitudes that allows a finite evaluation of the unitarity cuts in the channel of a single massive external fermion.","authors_text":"Edoardo Mirabella, Ruth Britto","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-02-11T10:03:57Z","title":"Massive particles and unitarity cuts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.2426","kind":"arxiv","version":1},"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:bab79c3cace1552c9832f0cb31591c45c04f36c08a36f35efa78cf0cb9501304","target":"record","created_at":"2026-05-18T04:02:26Z","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":"ecc0ded52edf43151be4667998f6d1378840d67373920b11acc2526474340b33","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-02-11T10:03:57Z","title_canon_sha256":"97aed4ddf31c0c814982b5cd238ea154a4b2c24982dcfc4d7cfe2b1b61b4b748"},"schema_version":"1.0","source":{"id":"1202.2426","kind":"arxiv","version":1}},"canonical_sha256":"6f30ddb5df5d763d5caa96797d4eccfac6c7eac68727570188f48968491d681b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6f30ddb5df5d763d5caa96797d4eccfac6c7eac68727570188f48968491d681b","first_computed_at":"2026-05-18T04:02:26.563481Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:02:26.563481Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"W46SC82pQDtdy5n4wWfq7nHrD/UnEMypbjW+/83tPnr8LfupGnlZWB8m+e0EsC1g6DmmbEf56S6Zf+iJrx2qBA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:02:26.563944Z","signed_message":"canonical_sha256_bytes"},"source_id":"1202.2426","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bab79c3cace1552c9832f0cb31591c45c04f36c08a36f35efa78cf0cb9501304","sha256:0ab575c3b769589999d42daf90b406fc86d79eb71c6bca1b101889353794ac0a"],"state_sha256":"d06fad4254fb3f4462d8846947d6f2ae36f3cad9a84125cb5ac7cfcfd19897d2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"G88AugpibkTh7i18gUN5hI4TJDY836N7HFPceuDa512mhnGaQoXqC3d0+ge6IIpzagdrwtFpthoe3DQZFmMGBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T06:33:54.472006Z","bundle_sha256":"ad844b9c30b400c7ad694511d21c7ccd52aa57b5bf25376b3b5cc5e2e56f7016"}}