{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:E25THZ67I2YPGZNJ7ZGVBJATS6","short_pith_number":"pith:E25THZ67","canonical_record":{"source":{"id":"1307.3546","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2013-07-12T19:40:29Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"d8145d0bb73923c40cb29a06eed4462f2b7153daf32c0bf238b1cff7a8fc6a31","abstract_canon_sha256":"02178ba3b2f89e4f1c6bc783e0ab903c9915fccebba674a41bc20aabf1653df3"},"schema_version":"1.0"},"canonical_sha256":"26bb33e7df46b0f365a9fe4d50a41397be5aa73150c38ea32b9a81d9a7216b40","source":{"kind":"arxiv","id":"1307.3546","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.3546","created_at":"2026-05-18T03:17:33Z"},{"alias_kind":"arxiv_version","alias_value":"1307.3546v2","created_at":"2026-05-18T03:17:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.3546","created_at":"2026-05-18T03:17:33Z"},{"alias_kind":"pith_short_12","alias_value":"E25THZ67I2YP","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"E25THZ67I2YPGZNJ","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"E25THZ67","created_at":"2026-05-18T12:27:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:E25THZ67I2YPGZNJ7ZGVBJATS6","target":"record","payload":{"canonical_record":{"source":{"id":"1307.3546","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2013-07-12T19:40:29Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"d8145d0bb73923c40cb29a06eed4462f2b7153daf32c0bf238b1cff7a8fc6a31","abstract_canon_sha256":"02178ba3b2f89e4f1c6bc783e0ab903c9915fccebba674a41bc20aabf1653df3"},"schema_version":"1.0"},"canonical_sha256":"26bb33e7df46b0f365a9fe4d50a41397be5aa73150c38ea32b9a81d9a7216b40","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:17:33.663835Z","signature_b64":"gdJ2eHEkcCfTFrzqCNgTwskH0zTCA81jaN8kwpSoSjnznlX0Z2YNRL6zFAD+itgThhjJ0A07DLMxIZN/5B0MBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"26bb33e7df46b0f365a9fe4d50a41397be5aa73150c38ea32b9a81d9a7216b40","last_reissued_at":"2026-05-18T03:17:33.663277Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:17:33.663277Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.3546","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:17:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UXAKS9i10JxvPGTSuc0muRduF6vnQ+ILq8pbZIIR+uzhSE78B8jjWMvMgNilRUqpnC1yBsbdM3U34io4jez0DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T01:38:03.064478Z"},"content_sha256":"48bbeb12edb7db7341dbc713bd057c41dbc90e48a2f8b0283c1a5730d19e915a","schema_version":"1.0","event_id":"sha256:48bbeb12edb7db7341dbc713bd057c41dbc90e48a2f8b0283c1a5730d19e915a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:E25THZ67I2YPGZNJ7ZGVBJATS6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Matrix Element Method: Past, Present, and Future","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"James S. Gainer, Joseph Lykken, Konstantin T. Matchev, Myeonghun Park, Stephen Mrenna","submitted_at":"2013-07-12T19:40:29Z","abstract_excerpt":"The increasing use of multivariate methods, and in particular the Matrix Element Method (MEM), represents a revolution in experimental particle physics. With continued exponential growth in computing capabilities, the use of sophisticated multivariate methods-- already common-- will soon become ubiquitous and ultimately almost compulsory. While the existence of sophisticated algorithms for disentangling signal and background might naively suggest a diminished role for theorists, the use of the MEM, with its inherent connection to the calculation of differential cross sections will benefit from"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.3546","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:17:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X2o+maAhFd+mZI0OUh/nK12lQvR6SZdS22Piiau8weF/pHOF6dWjGhp4uIehWJFTofBVMrKLrKlRaoXGfQgqBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T01:38:03.064832Z"},"content_sha256":"73516cf136076168fec3daaaf71fe733ce7c44da439d26b0268c89c7c35911ba","schema_version":"1.0","event_id":"sha256:73516cf136076168fec3daaaf71fe733ce7c44da439d26b0268c89c7c35911ba"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/E25THZ67I2YPGZNJ7ZGVBJATS6/bundle.json","state_url":"https://pith.science/pith/E25THZ67I2YPGZNJ7ZGVBJATS6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/E25THZ67I2YPGZNJ7ZGVBJATS6/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":"2026-06-02T01:38:03Z","links":{"resolver":"https://pith.science/pith/E25THZ67I2YPGZNJ7ZGVBJATS6","bundle":"https://pith.science/pith/E25THZ67I2YPGZNJ7ZGVBJATS6/bundle.json","state":"https://pith.science/pith/E25THZ67I2YPGZNJ7ZGVBJATS6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/E25THZ67I2YPGZNJ7ZGVBJATS6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:E25THZ67I2YPGZNJ7ZGVBJATS6","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":"02178ba3b2f89e4f1c6bc783e0ab903c9915fccebba674a41bc20aabf1653df3","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2013-07-12T19:40:29Z","title_canon_sha256":"d8145d0bb73923c40cb29a06eed4462f2b7153daf32c0bf238b1cff7a8fc6a31"},"schema_version":"1.0","source":{"id":"1307.3546","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.3546","created_at":"2026-05-18T03:17:33Z"},{"alias_kind":"arxiv_version","alias_value":"1307.3546v2","created_at":"2026-05-18T03:17:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.3546","created_at":"2026-05-18T03:17:33Z"},{"alias_kind":"pith_short_12","alias_value":"E25THZ67I2YP","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"E25THZ67I2YPGZNJ","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"E25THZ67","created_at":"2026-05-18T12:27:43Z"}],"graph_snapshots":[{"event_id":"sha256:73516cf136076168fec3daaaf71fe733ce7c44da439d26b0268c89c7c35911ba","target":"graph","created_at":"2026-05-18T03:17:33Z","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":"The increasing use of multivariate methods, and in particular the Matrix Element Method (MEM), represents a revolution in experimental particle physics. With continued exponential growth in computing capabilities, the use of sophisticated multivariate methods-- already common-- will soon become ubiquitous and ultimately almost compulsory. While the existence of sophisticated algorithms for disentangling signal and background might naively suggest a diminished role for theorists, the use of the MEM, with its inherent connection to the calculation of differential cross sections will benefit from","authors_text":"James S. Gainer, Joseph Lykken, Konstantin T. Matchev, Myeonghun Park, Stephen Mrenna","cross_cats":["hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2013-07-12T19:40:29Z","title":"The Matrix Element Method: Past, Present, and Future"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.3546","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":"sha256:48bbeb12edb7db7341dbc713bd057c41dbc90e48a2f8b0283c1a5730d19e915a","target":"record","created_at":"2026-05-18T03:17:33Z","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":"02178ba3b2f89e4f1c6bc783e0ab903c9915fccebba674a41bc20aabf1653df3","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2013-07-12T19:40:29Z","title_canon_sha256":"d8145d0bb73923c40cb29a06eed4462f2b7153daf32c0bf238b1cff7a8fc6a31"},"schema_version":"1.0","source":{"id":"1307.3546","kind":"arxiv","version":2}},"canonical_sha256":"26bb33e7df46b0f365a9fe4d50a41397be5aa73150c38ea32b9a81d9a7216b40","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"26bb33e7df46b0f365a9fe4d50a41397be5aa73150c38ea32b9a81d9a7216b40","first_computed_at":"2026-05-18T03:17:33.663277Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:17:33.663277Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gdJ2eHEkcCfTFrzqCNgTwskH0zTCA81jaN8kwpSoSjnznlX0Z2YNRL6zFAD+itgThhjJ0A07DLMxIZN/5B0MBw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:17:33.663835Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.3546","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:48bbeb12edb7db7341dbc713bd057c41dbc90e48a2f8b0283c1a5730d19e915a","sha256:73516cf136076168fec3daaaf71fe733ce7c44da439d26b0268c89c7c35911ba"],"state_sha256":"eb51c6d8069d742a15bb7fbd1b9dd5e63d7f5d56c79c1a1a5c571b9ff3316920"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hS4cMwUXzmWbhDWbam2Ioa5QE15XHQS9nONkBH973ycwNCB3KwbIekxu+p7+irTzjVG7bbGf3HoeV35JxV/kCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T01:38:03.066838Z","bundle_sha256":"20a44f311677a7a8b0d79c98bfdb93847bbd79b3363f0eab420ca5aa3e091fb2"}}