{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:4ELFCF37UFOPI5VZJKAOMXYEGR","short_pith_number":"pith:4ELFCF37","canonical_record":{"source":{"id":"1503.03271","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-03-11T11:01:06Z","cross_cats_sorted":[],"title_canon_sha256":"b7229794ac34cead6e0bfe8c69bec7df076b8d7e5e64d17fc95ce1c62a88721a","abstract_canon_sha256":"b854815c4b74429ac0366afcb2a4659e32087d6878b2cd5e68c59d1948581ff2"},"schema_version":"1.0"},"canonical_sha256":"e11651177fa15cf476b94a80e65f04346cd764ede4ed15830a133d6041e1971a","source":{"kind":"arxiv","id":"1503.03271","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.03271","created_at":"2026-05-18T01:16:29Z"},{"alias_kind":"arxiv_version","alias_value":"1503.03271v3","created_at":"2026-05-18T01:16:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.03271","created_at":"2026-05-18T01:16:29Z"},{"alias_kind":"pith_short_12","alias_value":"4ELFCF37UFOP","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"4ELFCF37UFOPI5VZ","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"4ELFCF37","created_at":"2026-05-18T12:29:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:4ELFCF37UFOPI5VZJKAOMXYEGR","target":"record","payload":{"canonical_record":{"source":{"id":"1503.03271","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-03-11T11:01:06Z","cross_cats_sorted":[],"title_canon_sha256":"b7229794ac34cead6e0bfe8c69bec7df076b8d7e5e64d17fc95ce1c62a88721a","abstract_canon_sha256":"b854815c4b74429ac0366afcb2a4659e32087d6878b2cd5e68c59d1948581ff2"},"schema_version":"1.0"},"canonical_sha256":"e11651177fa15cf476b94a80e65f04346cd764ede4ed15830a133d6041e1971a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:16:29.837496Z","signature_b64":"RuQcr0TydmgZy69zIoCmC5qP8sRiEnl9k4EuAFRwNtCEEBA4JPOUdbonvMeYSs9p+Sp9SsbhRStTThwB9VvmCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e11651177fa15cf476b94a80e65f04346cd764ede4ed15830a133d6041e1971a","last_reissued_at":"2026-05-18T01:16:29.836971Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:16:29.836971Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1503.03271","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:16:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fhY7R1jeiNAr0IAUltfbcuiiX9RGkrCLkxFJ45TX05XcnI58E4WPUAjVBtSYuRbj8TWCVt4QO+OAMW8hwAkBBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T16:42:25.081754Z"},"content_sha256":"db73942b93c0f6100b2fe0a58fac519c03001c4504b9867da8b8c5091c9f93b8","schema_version":"1.0","event_id":"sha256:db73942b93c0f6100b2fe0a58fac519c03001c4504b9867da8b8c5091c9f93b8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:4ELFCF37UFOPI5VZJKAOMXYEGR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Semiclassical picture for electron-positron photoproduction in strong laser fields","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Antonino Di Piazza, Christoph H. Keitel, Sebastian Meuren","submitted_at":"2015-03-11T11:01:06Z","abstract_excerpt":"The nonlinear Breit-Wheeler process is studied in the presence of strong and short laser pulses. We show that for a relativistically intense plane-wave laser field many features of the momentum distribution of the produced electron-positron pair like its extension, region of highest probability and carrier-envelope phase effects can be explained from the classical evolution of the created particles in the background field. To this end an intuitive semiclassical picture based on the local constant-crossed field approximation applied on the probability-amplitude level is established and compared"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.03271","kind":"arxiv","version":3},"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":"2026-05-18T01:16:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7UnH33fKfLqWQbhnU+Jnbf7kCVcDyr009zAn06y2Lv32yN2/JonTvj5VtZhfXYdC5RrgP2E6W/ZUvOqS2QmqBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T16:42:25.082933Z"},"content_sha256":"f8f9e463287257c558ffc5eef5088c571b4c9696d4cb37f6c3824609d20274bd","schema_version":"1.0","event_id":"sha256:f8f9e463287257c558ffc5eef5088c571b4c9696d4cb37f6c3824609d20274bd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4ELFCF37UFOPI5VZJKAOMXYEGR/bundle.json","state_url":"https://pith.science/pith/4ELFCF37UFOPI5VZJKAOMXYEGR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4ELFCF37UFOPI5VZJKAOMXYEGR/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":"2026-08-03T16:42:25Z","links":{"resolver":"https://pith.science/pith/4ELFCF37UFOPI5VZJKAOMXYEGR","bundle":"https://pith.science/pith/4ELFCF37UFOPI5VZJKAOMXYEGR/bundle.json","state":"https://pith.science/pith/4ELFCF37UFOPI5VZJKAOMXYEGR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4ELFCF37UFOPI5VZJKAOMXYEGR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:4ELFCF37UFOPI5VZJKAOMXYEGR","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":"b854815c4b74429ac0366afcb2a4659e32087d6878b2cd5e68c59d1948581ff2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-03-11T11:01:06Z","title_canon_sha256":"b7229794ac34cead6e0bfe8c69bec7df076b8d7e5e64d17fc95ce1c62a88721a"},"schema_version":"1.0","source":{"id":"1503.03271","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.03271","created_at":"2026-05-18T01:16:29Z"},{"alias_kind":"arxiv_version","alias_value":"1503.03271v3","created_at":"2026-05-18T01:16:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.03271","created_at":"2026-05-18T01:16:29Z"},{"alias_kind":"pith_short_12","alias_value":"4ELFCF37UFOP","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"4ELFCF37UFOPI5VZ","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"4ELFCF37","created_at":"2026-05-18T12:29:05Z"}],"graph_snapshots":[{"event_id":"sha256:f8f9e463287257c558ffc5eef5088c571b4c9696d4cb37f6c3824609d20274bd","target":"graph","created_at":"2026-05-18T01:16:29Z","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 nonlinear Breit-Wheeler process is studied in the presence of strong and short laser pulses. We show that for a relativistically intense plane-wave laser field many features of the momentum distribution of the produced electron-positron pair like its extension, region of highest probability and carrier-envelope phase effects can be explained from the classical evolution of the created particles in the background field. To this end an intuitive semiclassical picture based on the local constant-crossed field approximation applied on the probability-amplitude level is established and compared","authors_text":"Antonino Di Piazza, Christoph H. Keitel, Sebastian Meuren","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-03-11T11:01:06Z","title":"Semiclassical picture for electron-positron photoproduction in strong laser fields"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.03271","kind":"arxiv","version":3},"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:db73942b93c0f6100b2fe0a58fac519c03001c4504b9867da8b8c5091c9f93b8","target":"record","created_at":"2026-05-18T01:16:29Z","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":"b854815c4b74429ac0366afcb2a4659e32087d6878b2cd5e68c59d1948581ff2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-03-11T11:01:06Z","title_canon_sha256":"b7229794ac34cead6e0bfe8c69bec7df076b8d7e5e64d17fc95ce1c62a88721a"},"schema_version":"1.0","source":{"id":"1503.03271","kind":"arxiv","version":3}},"canonical_sha256":"e11651177fa15cf476b94a80e65f04346cd764ede4ed15830a133d6041e1971a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e11651177fa15cf476b94a80e65f04346cd764ede4ed15830a133d6041e1971a","first_computed_at":"2026-05-18T01:16:29.836971Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:16:29.836971Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RuQcr0TydmgZy69zIoCmC5qP8sRiEnl9k4EuAFRwNtCEEBA4JPOUdbonvMeYSs9p+Sp9SsbhRStTThwB9VvmCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:16:29.837496Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.03271","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:db73942b93c0f6100b2fe0a58fac519c03001c4504b9867da8b8c5091c9f93b8","sha256:f8f9e463287257c558ffc5eef5088c571b4c9696d4cb37f6c3824609d20274bd"],"state_sha256":"285eb6574a64d8050f12a36ed3bcb8a2239652d3122fd22a5080e80f51bbd1c9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/weyqD25VZPPxMGT2jvG/jq25aOXAkc9lC0v32nZYYcYKaWgqvxiDfve9lMzHmo1InHF9KDtKS0FtVmC+Os3Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T16:42:25.091075Z","bundle_sha256":"31369857384fbe60f72f086ab1b256ce49ad48c3e361e313f1993c96bd89b5b1"}}