{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:C46UGBX4N56M7LTYTZVA4QD6QZ","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":"836f424d64f5ecfbad61bb2d28fadbe00863e6dac604859f4930a93bc776b217","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"2002-10-07T15:54:16Z","title_canon_sha256":"8ae706b70d9014a51ed0df8d185baa4d0e879b3211cd891eb36f481fd1aa98db"},"schema_version":"1.0","source":{"id":"hep-ph/0210107","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/0210107","created_at":"2026-05-18T00:36:56Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/0210107v1","created_at":"2026-05-18T00:36:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/0210107","created_at":"2026-05-18T00:36:56Z"},{"alias_kind":"pith_short_12","alias_value":"C46UGBX4N56M","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"C46UGBX4N56M7LTY","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"C46UGBX4","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:3638966d5062cb5581f2418248a6a2715711b448918475b9d9744b2653e8640a","target":"graph","created_at":"2026-05-18T00:36:56Z","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":"Ultra high energy (UHE) photons can initiate electromagnetic showers in magnetic field. We analyze the two processes that determine the development of the shower, $e^+ e^-$ pair creation and synchrotron radiation, and derive formulae for the angular distribution of the produced particles. These formulae are necessary to study the three-dimensional development of the shower.","authors_text":"Giuseppe Mezzorani, Marcello Lissia, Massimo Coraddu","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"2002-10-07T15:54:16Z","title":"Ultra high energy photon showers in magnetic field:angular distribution of produced particles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0210107","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":"sha256:1e0f8b9681733d371451defe01a49a5d8a7db71fcb5700d99f7a92ed6cb0ad34","target":"record","created_at":"2026-05-18T00:36:56Z","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":"836f424d64f5ecfbad61bb2d28fadbe00863e6dac604859f4930a93bc776b217","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"2002-10-07T15:54:16Z","title_canon_sha256":"8ae706b70d9014a51ed0df8d185baa4d0e879b3211cd891eb36f481fd1aa98db"},"schema_version":"1.0","source":{"id":"hep-ph/0210107","kind":"arxiv","version":1}},"canonical_sha256":"173d4306fc6f7ccfae789e6a0e407e86651cb73730f9f6a66b06f7439651bd88","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"173d4306fc6f7ccfae789e6a0e407e86651cb73730f9f6a66b06f7439651bd88","first_computed_at":"2026-05-18T00:36:56.754768Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:36:56.754768Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8iZJjtGbm/QCR3CMvblfvd0i32wOTzfaaKqDXnM04P7p6V9kOB+YPm3boZuVYV9QuEd/txP17SHq9DbQLVQBAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:36:56.755236Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ph/0210107","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1e0f8b9681733d371451defe01a49a5d8a7db71fcb5700d99f7a92ed6cb0ad34","sha256:3638966d5062cb5581f2418248a6a2715711b448918475b9d9744b2653e8640a"],"state_sha256":"59dc433f1b378ea8971e5d4467ab976aaf0a79ff55ae7e5ef945197221916ba3"}