{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:3FC7KTUDSMJECUHL5O3JQ4XFUQ","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":"12877d8162ba88f3a2213633338dcf488d6593e83eb4ab3d7d740165888e6ac7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2009-08-14T14:32:28Z","title_canon_sha256":"7e2a00452973d74d5c246dd9f4be38f4a19d76bc0b72d1fc7171f60bdfa4316d"},"schema_version":"1.0","source":{"id":"0908.2075","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0908.2075","created_at":"2026-05-18T04:00:27Z"},{"alias_kind":"arxiv_version","alias_value":"0908.2075v4","created_at":"2026-05-18T04:00:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0908.2075","created_at":"2026-05-18T04:00:27Z"},{"alias_kind":"pith_short_12","alias_value":"3FC7KTUDSMJE","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"3FC7KTUDSMJECUHL","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"3FC7KTUD","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:66e7b7eaa606e8214d1e28a9516961ad3decac422a79297867dcab4a95656356","target":"graph","created_at":"2026-05-18T04:00:27Z","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":"Using the semi-classical method of Nikishov-Ritus (NR), the derivation of the transition rate of the beamstrahlung process is reviewed. This method uses the Bound Interaction Picture and the exact solutions of the Dirac equation in the external field potential. For future linear colliders, the nominal machine parameters are such that this external field can be considered to be a constant crossed electromagnetic field. The Dirac equation solutions can be Fourier transformed such that they are functions of Dirac gamma matrices, Airy functions and the usual non-external field solution. The result","authors_text":"Anthony Hartin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2009-08-14T14:32:28Z","title":"On the equivalence of semi-classical methods for QED in intense external fields"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0908.2075","kind":"arxiv","version":4},"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:fe644fca6005b4c23c0bd35718e6f603af3d90f78128840fcc41ecb7a747aab0","target":"record","created_at":"2026-05-18T04:00:27Z","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":"12877d8162ba88f3a2213633338dcf488d6593e83eb4ab3d7d740165888e6ac7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2009-08-14T14:32:28Z","title_canon_sha256":"7e2a00452973d74d5c246dd9f4be38f4a19d76bc0b72d1fc7171f60bdfa4316d"},"schema_version":"1.0","source":{"id":"0908.2075","kind":"arxiv","version":4}},"canonical_sha256":"d945f54e8393124150ebebb69872e5a43edc162a15ebb943151722c0b82c8815","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d945f54e8393124150ebebb69872e5a43edc162a15ebb943151722c0b82c8815","first_computed_at":"2026-05-18T04:00:27.203708Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:00:27.203708Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AcQGZ8mdHlgDy858/IRcAH3/d6BoiHObdBRpAW82Kzfji5RRqGkg6jjPPE3ZtA4+Ymp0cr/C0WrAfuYogP0pCA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:00:27.204237Z","signed_message":"canonical_sha256_bytes"},"source_id":"0908.2075","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fe644fca6005b4c23c0bd35718e6f603af3d90f78128840fcc41ecb7a747aab0","sha256:66e7b7eaa606e8214d1e28a9516961ad3decac422a79297867dcab4a95656356"],"state_sha256":"e350d4dbcec691835ae3de6389aee6f57e8f0f6ef39f22469647c8594a00534c"}