{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2005:UDVVR2XFLF773PNOLCERV5VFNE","short_pith_number":"pith:UDVVR2XF","canonical_record":{"source":{"id":"hep-ph/0503281","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"2005-03-29T18:42:23Z","cross_cats_sorted":[],"title_canon_sha256":"904c9d9656b1e9619b97765805cb5aad44a5a6f528b6e39ef2c56cebdb2fc189","abstract_canon_sha256":"e2841ebadd106e1c01f8db237ec63dc77a1abdde41b36d060541221a6f34a398"},"schema_version":"1.0"},"canonical_sha256":"a0eb58eae5597ffdbdae58891af6a5691a11a865b6734623ce38feaa6498ebac","source":{"kind":"arxiv","id":"hep-ph/0503281","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/0503281","created_at":"2026-07-04T16:55:38Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/0503281v1","created_at":"2026-07-04T16:55:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/0503281","created_at":"2026-07-04T16:55:38Z"},{"alias_kind":"pith_short_12","alias_value":"UDVVR2XFLF77","created_at":"2026-07-04T16:55:38Z"},{"alias_kind":"pith_short_16","alias_value":"UDVVR2XFLF773PNO","created_at":"2026-07-04T16:55:38Z"},{"alias_kind":"pith_short_8","alias_value":"UDVVR2XF","created_at":"2026-07-04T16:55:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2005:UDVVR2XFLF773PNOLCERV5VFNE","target":"record","payload":{"canonical_record":{"source":{"id":"hep-ph/0503281","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"2005-03-29T18:42:23Z","cross_cats_sorted":[],"title_canon_sha256":"904c9d9656b1e9619b97765805cb5aad44a5a6f528b6e39ef2c56cebdb2fc189","abstract_canon_sha256":"e2841ebadd106e1c01f8db237ec63dc77a1abdde41b36d060541221a6f34a398"},"schema_version":"1.0"},"canonical_sha256":"a0eb58eae5597ffdbdae58891af6a5691a11a865b6734623ce38feaa6498ebac","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:55:38.615616Z","signature_b64":"n0V8LHedUweoesyLK+LU6rPGr9FiSG1V92QUF0NjoxEQkWGN9PSnsOtjiFDFhy6lNHIsJOyOww+hPEZIyljaAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a0eb58eae5597ffdbdae58891af6a5691a11a865b6734623ce38feaa6498ebac","last_reissued_at":"2026-07-04T16:55:38.615214Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:55:38.615214Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-ph/0503281","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":"2026-07-04T16:55:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iQqS00m883uAtGzVdrqEfx1Bg5whn922Yhi9fUxphEl3CTvO/Udq9FWIaoVUqMXjRZPILw2WPn8ns5Ejf+IgBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T11:25:05.603316Z"},"content_sha256":"95133ce1805ce09d6ebd8dbb15002226fe67347d215a209737854c03bab07684","schema_version":"1.0","event_id":"sha256:95133ce1805ce09d6ebd8dbb15002226fe67347d215a209737854c03bab07684"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2005:UDVVR2XFLF773PNOLCERV5VFNE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Implementing the ME+PS merging algorithm","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Andreas Schaelicke, Frank Krauss","submitted_at":"2005-03-29T18:42:23Z","abstract_excerpt":"The method to merge matrix elements for multi particle production and parton showers in electron-positron annihilations and hadronic collisions and its implementation into the new event generator SHERPA is described in detail. Examples highlighting different aspects of it are thoroughly discussed, some results for various cases are presented. In addition, a way to extend this method to general electroweak interactions is presented."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0503281","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/hep-ph/0503281/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T16:55:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CDsE1KKYFJhqGcqmM5i1Zt0SZjEb0C/Ed6tUon4xLVzrHoAlcAtiSSnIkluWM7adA5lqDTrbDiZmmKMREpKvBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T11:25:05.603913Z"},"content_sha256":"8afbe5dd5d7f706ebbf17093cbc85b4b1b815fcfd9ec5c45256d854c65f39001","schema_version":"1.0","event_id":"sha256:8afbe5dd5d7f706ebbf17093cbc85b4b1b815fcfd9ec5c45256d854c65f39001"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UDVVR2XFLF773PNOLCERV5VFNE/bundle.json","state_url":"https://pith.science/pith/UDVVR2XFLF773PNOLCERV5VFNE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UDVVR2XFLF773PNOLCERV5VFNE/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":"2026-08-03T11:25:05Z","links":{"resolver":"https://pith.science/pith/UDVVR2XFLF773PNOLCERV5VFNE","bundle":"https://pith.science/pith/UDVVR2XFLF773PNOLCERV5VFNE/bundle.json","state":"https://pith.science/pith/UDVVR2XFLF773PNOLCERV5VFNE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UDVVR2XFLF773PNOLCERV5VFNE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2005:UDVVR2XFLF773PNOLCERV5VFNE","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":"e2841ebadd106e1c01f8db237ec63dc77a1abdde41b36d060541221a6f34a398","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"2005-03-29T18:42:23Z","title_canon_sha256":"904c9d9656b1e9619b97765805cb5aad44a5a6f528b6e39ef2c56cebdb2fc189"},"schema_version":"1.0","source":{"id":"hep-ph/0503281","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/0503281","created_at":"2026-07-04T16:55:38Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/0503281v1","created_at":"2026-07-04T16:55:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/0503281","created_at":"2026-07-04T16:55:38Z"},{"alias_kind":"pith_short_12","alias_value":"UDVVR2XFLF77","created_at":"2026-07-04T16:55:38Z"},{"alias_kind":"pith_short_16","alias_value":"UDVVR2XFLF773PNO","created_at":"2026-07-04T16:55:38Z"},{"alias_kind":"pith_short_8","alias_value":"UDVVR2XF","created_at":"2026-07-04T16:55:38Z"}],"graph_snapshots":[{"event_id":"sha256:8afbe5dd5d7f706ebbf17093cbc85b4b1b815fcfd9ec5c45256d854c65f39001","target":"graph","created_at":"2026-07-04T16:55:38Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/hep-ph/0503281/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The method to merge matrix elements for multi particle production and parton showers in electron-positron annihilations and hadronic collisions and its implementation into the new event generator SHERPA is described in detail. Examples highlighting different aspects of it are thoroughly discussed, some results for various cases are presented. In addition, a way to extend this method to general electroweak interactions is presented.","authors_text":"Andreas Schaelicke, Frank Krauss","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"2005-03-29T18:42:23Z","title":"Implementing the ME+PS merging algorithm"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0503281","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":"sha256:95133ce1805ce09d6ebd8dbb15002226fe67347d215a209737854c03bab07684","target":"record","created_at":"2026-07-04T16:55:38Z","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":"e2841ebadd106e1c01f8db237ec63dc77a1abdde41b36d060541221a6f34a398","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"2005-03-29T18:42:23Z","title_canon_sha256":"904c9d9656b1e9619b97765805cb5aad44a5a6f528b6e39ef2c56cebdb2fc189"},"schema_version":"1.0","source":{"id":"hep-ph/0503281","kind":"arxiv","version":1}},"canonical_sha256":"a0eb58eae5597ffdbdae58891af6a5691a11a865b6734623ce38feaa6498ebac","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a0eb58eae5597ffdbdae58891af6a5691a11a865b6734623ce38feaa6498ebac","first_computed_at":"2026-07-04T16:55:38.615214Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:55:38.615214Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"n0V8LHedUweoesyLK+LU6rPGr9FiSG1V92QUF0NjoxEQkWGN9PSnsOtjiFDFhy6lNHIsJOyOww+hPEZIyljaAg==","signature_status":"signed_v1","signed_at":"2026-07-04T16:55:38.615616Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ph/0503281","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:95133ce1805ce09d6ebd8dbb15002226fe67347d215a209737854c03bab07684","sha256:8afbe5dd5d7f706ebbf17093cbc85b4b1b815fcfd9ec5c45256d854c65f39001"],"state_sha256":"ff4897b6c796f845cecb33e62c75716cdb05e7a359f9f9bed4f23d112c19bedf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JtfHSBfYcQQ0yaZ/l/HKrB8UDK+7LvZFbFR7X9YU0yBETkKaj77K0u702LgEz0rpafbwAT3EEzGr9T+H4L0+BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T11:25:05.607666Z","bundle_sha256":"3a86c5199474b3a5515da55fd8ed48d18adb521676e05e77471baafcf7e0d7e2"}}