{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:L4BLTYU766SRWJYE6RHITXB4RO","short_pith_number":"pith:L4BLTYU7","canonical_record":{"source":{"id":"1307.1060","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2013-07-03T16:06:55Z","cross_cats_sorted":[],"title_canon_sha256":"4f467362555cb1d53e334e6dbcbc3791ca9965e086ebd892332fdda1bc3d91ab","abstract_canon_sha256":"b7852ad0f14aca1468244c7320a8bfa95153574f47c85cb503bd95ee463c50d3"},"schema_version":"1.0"},"canonical_sha256":"5f02b9e29ff7a51b2704f44e89dc3c8b82d7ba51be01b1403a6a98a5b6c9b02c","source":{"kind":"arxiv","id":"1307.1060","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.1060","created_at":"2026-05-18T03:19:23Z"},{"alias_kind":"arxiv_version","alias_value":"1307.1060v1","created_at":"2026-05-18T03:19:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.1060","created_at":"2026-05-18T03:19:23Z"},{"alias_kind":"pith_short_12","alias_value":"L4BLTYU766SR","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"L4BLTYU766SRWJYE","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"L4BLTYU7","created_at":"2026-05-18T12:27:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:L4BLTYU766SRWJYE6RHITXB4RO","target":"record","payload":{"canonical_record":{"source":{"id":"1307.1060","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2013-07-03T16:06:55Z","cross_cats_sorted":[],"title_canon_sha256":"4f467362555cb1d53e334e6dbcbc3791ca9965e086ebd892332fdda1bc3d91ab","abstract_canon_sha256":"b7852ad0f14aca1468244c7320a8bfa95153574f47c85cb503bd95ee463c50d3"},"schema_version":"1.0"},"canonical_sha256":"5f02b9e29ff7a51b2704f44e89dc3c8b82d7ba51be01b1403a6a98a5b6c9b02c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:19:23.016246Z","signature_b64":"ai/TDte07sz1lBIyuuE8GmRZ+tVjmLp6+7Xr17K3R8g1BgQyVbLVoePBwggu1YzANZZ08FlpZ40zFEGdzqY7Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5f02b9e29ff7a51b2704f44e89dc3c8b82d7ba51be01b1403a6a98a5b6c9b02c","last_reissued_at":"2026-05-18T03:19:23.014850Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:19:23.014850Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.1060","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":"2026-05-18T03:19:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D401ZCbyz+ydGeWuV8sQtG0j1PptoCon/FQA2+HeF50YZDe6EacZwtFmyiVXBsRQ06Y2Q98JjH0BGSDY91R3Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:47:10.273875Z"},"content_sha256":"fb27b7d9fe16f3e55e844e956b8447ab924ea97cb6afe78af6a9449fb2383836","schema_version":"1.0","event_id":"sha256:fb27b7d9fe16f3e55e844e956b8447ab924ea97cb6afe78af6a9449fb2383836"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:L4BLTYU766SRWJYE6RHITXB4RO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Vincia Parton Shower","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Andrew J. Larkoski, David A. Kosower, Eric Laenen, Juan J. Lopez-Villarejo, Lisa Hartgring, Mathias Ritzmann, Peter Skands, Walter T. Giele","submitted_at":"2013-07-03T16:06:55Z","abstract_excerpt":"We summarize recent developments in the VINCIA parton shower. After a brief review of the basics of the formalism, the extension of VINCIA to hadron collisions is sketched. We then turn to improvements of the efficiency of tree-level matching by making the shower history unique and by incorporating identified helicities. We conclude with an overview of matching to one-loop matrix elements."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.1060","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":"2026-05-18T03:19:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wHevuHd1fkdousJEGYrM83FJ+6ROjVBFPQ1c4DyELMbTCoNH2/VTnIj4fjL+tp/s5qrMZFa5IUer149/8oAcAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:47:10.274584Z"},"content_sha256":"800e078b16dc5e1769c9a55224b3415994a7db18fb38f1819c0356a31ee7ffec","schema_version":"1.0","event_id":"sha256:800e078b16dc5e1769c9a55224b3415994a7db18fb38f1819c0356a31ee7ffec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L4BLTYU766SRWJYE6RHITXB4RO/bundle.json","state_url":"https://pith.science/pith/L4BLTYU766SRWJYE6RHITXB4RO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L4BLTYU766SRWJYE6RHITXB4RO/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":"2026-05-25T13:47:10Z","links":{"resolver":"https://pith.science/pith/L4BLTYU766SRWJYE6RHITXB4RO","bundle":"https://pith.science/pith/L4BLTYU766SRWJYE6RHITXB4RO/bundle.json","state":"https://pith.science/pith/L4BLTYU766SRWJYE6RHITXB4RO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L4BLTYU766SRWJYE6RHITXB4RO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:L4BLTYU766SRWJYE6RHITXB4RO","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":"b7852ad0f14aca1468244c7320a8bfa95153574f47c85cb503bd95ee463c50d3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2013-07-03T16:06:55Z","title_canon_sha256":"4f467362555cb1d53e334e6dbcbc3791ca9965e086ebd892332fdda1bc3d91ab"},"schema_version":"1.0","source":{"id":"1307.1060","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.1060","created_at":"2026-05-18T03:19:23Z"},{"alias_kind":"arxiv_version","alias_value":"1307.1060v1","created_at":"2026-05-18T03:19:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.1060","created_at":"2026-05-18T03:19:23Z"},{"alias_kind":"pith_short_12","alias_value":"L4BLTYU766SR","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"L4BLTYU766SRWJYE","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"L4BLTYU7","created_at":"2026-05-18T12:27:51Z"}],"graph_snapshots":[{"event_id":"sha256:800e078b16dc5e1769c9a55224b3415994a7db18fb38f1819c0356a31ee7ffec","target":"graph","created_at":"2026-05-18T03:19:23Z","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 summarize recent developments in the VINCIA parton shower. After a brief review of the basics of the formalism, the extension of VINCIA to hadron collisions is sketched. We then turn to improvements of the efficiency of tree-level matching by making the shower history unique and by incorporating identified helicities. We conclude with an overview of matching to one-loop matrix elements.","authors_text":"Andrew J. Larkoski, David A. Kosower, Eric Laenen, Juan J. Lopez-Villarejo, Lisa Hartgring, Mathias Ritzmann, Peter Skands, Walter T. Giele","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2013-07-03T16:06:55Z","title":"The Vincia Parton Shower"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.1060","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:fb27b7d9fe16f3e55e844e956b8447ab924ea97cb6afe78af6a9449fb2383836","target":"record","created_at":"2026-05-18T03:19:23Z","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":"b7852ad0f14aca1468244c7320a8bfa95153574f47c85cb503bd95ee463c50d3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2013-07-03T16:06:55Z","title_canon_sha256":"4f467362555cb1d53e334e6dbcbc3791ca9965e086ebd892332fdda1bc3d91ab"},"schema_version":"1.0","source":{"id":"1307.1060","kind":"arxiv","version":1}},"canonical_sha256":"5f02b9e29ff7a51b2704f44e89dc3c8b82d7ba51be01b1403a6a98a5b6c9b02c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5f02b9e29ff7a51b2704f44e89dc3c8b82d7ba51be01b1403a6a98a5b6c9b02c","first_computed_at":"2026-05-18T03:19:23.014850Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:19:23.014850Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ai/TDte07sz1lBIyuuE8GmRZ+tVjmLp6+7Xr17K3R8g1BgQyVbLVoePBwggu1YzANZZ08FlpZ40zFEGdzqY7Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:19:23.016246Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.1060","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fb27b7d9fe16f3e55e844e956b8447ab924ea97cb6afe78af6a9449fb2383836","sha256:800e078b16dc5e1769c9a55224b3415994a7db18fb38f1819c0356a31ee7ffec"],"state_sha256":"7b97b6aebda9d4e38039497edb545825f30f13b4b3b85ceba1d20767326877be"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qjqrORz1yROCaVGa4iwNrheeMXlnb7gOnjEmMVMsfq+NRx2Wyih2vxcp/lQgSCo9ga+nT4VQ7/Ar2s8kns2nCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T13:47:10.277811Z","bundle_sha256":"e7eb8c974449b91da8ec380dd36214ddbe9fbf4e7d736633b81737d901a0e3ae"}}