{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:Z3OOKYLOCO6EP4N4PJYV5IHKTC","short_pith_number":"pith:Z3OOKYLO","canonical_record":{"source":{"id":"hep-ph/0407167","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"2004-07-15T02:15:48Z","cross_cats_sorted":[],"title_canon_sha256":"a3edf080d4600a70a2bc617d270d3dff121321269ddd81d8c2f949954ca1ec0e","abstract_canon_sha256":"86b8007c51699e38a22ba88401a2ed99f8a97de60219af3763fc753220a25530"},"schema_version":"1.0"},"canonical_sha256":"cedce5616e13bc47f1bc7a715ea0ea988f918fc77badc8ba51bd7d2976a454d7","source":{"kind":"arxiv","id":"hep-ph/0407167","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/0407167","created_at":"2026-05-18T02:36:21Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/0407167v2","created_at":"2026-05-18T02:36:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/0407167","created_at":"2026-05-18T02:36:21Z"},{"alias_kind":"pith_short_12","alias_value":"Z3OOKYLOCO6E","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"Z3OOKYLOCO6EP4N4","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"Z3OOKYLO","created_at":"2026-05-18T12:25:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:Z3OOKYLOCO6EP4N4PJYV5IHKTC","target":"record","payload":{"canonical_record":{"source":{"id":"hep-ph/0407167","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"2004-07-15T02:15:48Z","cross_cats_sorted":[],"title_canon_sha256":"a3edf080d4600a70a2bc617d270d3dff121321269ddd81d8c2f949954ca1ec0e","abstract_canon_sha256":"86b8007c51699e38a22ba88401a2ed99f8a97de60219af3763fc753220a25530"},"schema_version":"1.0"},"canonical_sha256":"cedce5616e13bc47f1bc7a715ea0ea988f918fc77badc8ba51bd7d2976a454d7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:36:21.203673Z","signature_b64":"DNtmWhaCKlPz6jZ8r5JEuUwHMN6tA2IGIniTgSjBMtQtTxnykneKO8X82VuAOhRNJZelOGItEOBQ3M6l3WkYAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cedce5616e13bc47f1bc7a715ea0ea988f918fc77badc8ba51bd7d2976a454d7","last_reissued_at":"2026-05-18T02:36:21.203145Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:36:21.203145Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-ph/0407167","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":"2026-05-18T02:36:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VwK9U99TVJdWZAwrtPeLDm7Gk67RXNd41xHoeGs5Rmgn55SiTRxEtoGq4kQNWLoBf5lKxpc7zLBN5siimxnHDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T21:15:30.498698Z"},"content_sha256":"7320c6423c1a21fbf19f0b5402966fe1dfed72fb333ba8365849e8f7ece03f45","schema_version":"1.0","event_id":"sha256:7320c6423c1a21fbf19f0b5402966fe1dfed72fb333ba8365849e8f7ece03f45"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:Z3OOKYLOCO6EP4N4PJYV5IHKTC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Collinear Photon Exchange in the Beam Normal Polarization Asymmetry of Elastic Electron-Proton Scattering","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Andrei Afanasev, N.P. Merenkov","submitted_at":"2004-07-15T02:15:48Z","abstract_excerpt":"The parity-conserving single-spin beam asymmetry of elastic electron-proton scattering is induced by an absorptive part of the two-photon exchange amplitude. We demonstrate that this asymmetry has logarithmic and double-logarithmic enhancement due to contributions of hard collinear quasi-real photons. An optical theorem is used to evaluate the asymmetry in terms of the total photoproduction cross section on the proton, predicting its magnitude at a few parts per million for high electon beam energies and small scattering angles. At fixed 4-momentum transfers, the asymmetry is rising logarithmi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0407167","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":"2026-05-18T02:36:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HaFTdtRzX1s8L/kGFpyVC5njy/p2u+zYqFNdBj1M/5a4xN9qZYmTGdPPAR0+pGRrUz1GEuaJGVTJOQVlsacyDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T21:15:30.499049Z"},"content_sha256":"057e56c7f7ddbcde5a8ad766d82fc9aebf51740eba79a9a06fe7c6206ea75464","schema_version":"1.0","event_id":"sha256:057e56c7f7ddbcde5a8ad766d82fc9aebf51740eba79a9a06fe7c6206ea75464"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Z3OOKYLOCO6EP4N4PJYV5IHKTC/bundle.json","state_url":"https://pith.science/pith/Z3OOKYLOCO6EP4N4PJYV5IHKTC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Z3OOKYLOCO6EP4N4PJYV5IHKTC/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":"2026-06-10T21:15:30Z","links":{"resolver":"https://pith.science/pith/Z3OOKYLOCO6EP4N4PJYV5IHKTC","bundle":"https://pith.science/pith/Z3OOKYLOCO6EP4N4PJYV5IHKTC/bundle.json","state":"https://pith.science/pith/Z3OOKYLOCO6EP4N4PJYV5IHKTC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Z3OOKYLOCO6EP4N4PJYV5IHKTC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:Z3OOKYLOCO6EP4N4PJYV5IHKTC","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":"86b8007c51699e38a22ba88401a2ed99f8a97de60219af3763fc753220a25530","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"2004-07-15T02:15:48Z","title_canon_sha256":"a3edf080d4600a70a2bc617d270d3dff121321269ddd81d8c2f949954ca1ec0e"},"schema_version":"1.0","source":{"id":"hep-ph/0407167","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/0407167","created_at":"2026-05-18T02:36:21Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/0407167v2","created_at":"2026-05-18T02:36:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/0407167","created_at":"2026-05-18T02:36:21Z"},{"alias_kind":"pith_short_12","alias_value":"Z3OOKYLOCO6E","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"Z3OOKYLOCO6EP4N4","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"Z3OOKYLO","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:057e56c7f7ddbcde5a8ad766d82fc9aebf51740eba79a9a06fe7c6206ea75464","target":"graph","created_at":"2026-05-18T02:36:21Z","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 parity-conserving single-spin beam asymmetry of elastic electron-proton scattering is induced by an absorptive part of the two-photon exchange amplitude. We demonstrate that this asymmetry has logarithmic and double-logarithmic enhancement due to contributions of hard collinear quasi-real photons. An optical theorem is used to evaluate the asymmetry in terms of the total photoproduction cross section on the proton, predicting its magnitude at a few parts per million for high electon beam energies and small scattering angles. At fixed 4-momentum transfers, the asymmetry is rising logarithmi","authors_text":"Andrei Afanasev, N.P. Merenkov","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"2004-07-15T02:15:48Z","title":"Collinear Photon Exchange in the Beam Normal Polarization Asymmetry of Elastic Electron-Proton Scattering"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0407167","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":"sha256:7320c6423c1a21fbf19f0b5402966fe1dfed72fb333ba8365849e8f7ece03f45","target":"record","created_at":"2026-05-18T02:36:21Z","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":"86b8007c51699e38a22ba88401a2ed99f8a97de60219af3763fc753220a25530","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"2004-07-15T02:15:48Z","title_canon_sha256":"a3edf080d4600a70a2bc617d270d3dff121321269ddd81d8c2f949954ca1ec0e"},"schema_version":"1.0","source":{"id":"hep-ph/0407167","kind":"arxiv","version":2}},"canonical_sha256":"cedce5616e13bc47f1bc7a715ea0ea988f918fc77badc8ba51bd7d2976a454d7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cedce5616e13bc47f1bc7a715ea0ea988f918fc77badc8ba51bd7d2976a454d7","first_computed_at":"2026-05-18T02:36:21.203145Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:36:21.203145Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DNtmWhaCKlPz6jZ8r5JEuUwHMN6tA2IGIniTgSjBMtQtTxnykneKO8X82VuAOhRNJZelOGItEOBQ3M6l3WkYAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:36:21.203673Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ph/0407167","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7320c6423c1a21fbf19f0b5402966fe1dfed72fb333ba8365849e8f7ece03f45","sha256:057e56c7f7ddbcde5a8ad766d82fc9aebf51740eba79a9a06fe7c6206ea75464"],"state_sha256":"0721c95dcd783ed58164b2db43519deaf62352a5fcc41603b75aa7a42f96e743"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c0ovDOURSfjTw5EHycYZNSwOtLLmkAn3SPiwuUMtB/X4277701rrPQIPCVO9y2gqHI68pIkGODnY6KLY2FLaAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T21:15:30.501408Z","bundle_sha256":"856cdcbc701096db798331113189785f72b78f94a02b4a35fbb7459502c64373"}}