{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:URLNMTWQGZYSKCBX6ESL7GPZQZ","short_pith_number":"pith:URLNMTWQ","canonical_record":{"source":{"id":"1607.02027","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-07-07T14:10:00Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"5577cf6dc66986b332c768d901b6b194386131ac4183222400e92a2ed4cd40d9","abstract_canon_sha256":"f532a9a2afdf22bef8141c8d73ba1a6e9b775ba6fbbf2c0b2c420b49173e253c"},"schema_version":"1.0"},"canonical_sha256":"a456d64ed03671250837f124bf99f9867f0330eb41fb8042180871f10c78f041","source":{"kind":"arxiv","id":"1607.02027","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.02027","created_at":"2026-05-18T01:11:22Z"},{"alias_kind":"arxiv_version","alias_value":"1607.02027v1","created_at":"2026-05-18T01:11:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.02027","created_at":"2026-05-18T01:11:22Z"},{"alias_kind":"pith_short_12","alias_value":"URLNMTWQGZYS","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"URLNMTWQGZYSKCBX","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"URLNMTWQ","created_at":"2026-05-18T12:30:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:URLNMTWQGZYSKCBX6ESL7GPZQZ","target":"record","payload":{"canonical_record":{"source":{"id":"1607.02027","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-07-07T14:10:00Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"5577cf6dc66986b332c768d901b6b194386131ac4183222400e92a2ed4cd40d9","abstract_canon_sha256":"f532a9a2afdf22bef8141c8d73ba1a6e9b775ba6fbbf2c0b2c420b49173e253c"},"schema_version":"1.0"},"canonical_sha256":"a456d64ed03671250837f124bf99f9867f0330eb41fb8042180871f10c78f041","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:11:22.748278Z","signature_b64":"vMY5quvP1T5AzqqgYFrRXtykLgKQiwxh3bI6yoVDjvPz2McliQ+OJtkch1I9BABS2uGKROwHXhOaTmNc8a/TDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a456d64ed03671250837f124bf99f9867f0330eb41fb8042180871f10c78f041","last_reissued_at":"2026-05-18T01:11:22.747638Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:11:22.747638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1607.02027","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":"2026-05-18T01:11:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YK1OGWWtom+aBPOM+tcvQAgRQIpeKZ+0+4LG9vZQZFgWjz5OSybm6RUGzco9cTC8rIQpEUnuAe0SPI1bj06zDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T13:09:16.590236Z"},"content_sha256":"a8fd7f3f5ca24cf0baac2bf571ac24807c2814e8e5c5499b00aa908e748a603a","schema_version":"1.0","event_id":"sha256:a8fd7f3f5ca24cf0baac2bf571ac24807c2814e8e5c5499b00aa908e748a603a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:URLNMTWQGZYSKCBX6ESL7GPZQZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On semi-exclusive measurement of $\\gamma\\gamma\\to\\gamma\\gamma$ scattering","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Janusz J. Chwastowski, Rafa{\\l} Staszewski","submitted_at":"2016-07-07T14:10:00Z","abstract_excerpt":"The two-photon production of photon pairs, i.e. the $\\gamma\\gamma\\to\\gamma\\gamma$ process, is studied. Different production modes regarding the elastic or inelastic coupling of the intermediate-state photons to the protons are considered. The semi-exclusive measurement, where one intact proton is registered by a dedicated forward proton detector, is discussed. As an example, the signal and background simulations are performed for the $\\gamma\\gamma\\to\\gamma\\gamma$ process mediated by the hypothetical 750 GeV resonance."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.02027","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":"2026-05-18T01:11:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SYa5QELiX5ZxE78aigwDNWP8az4LgKOau0eK6mNhEPAfYmm6B+B5oST4hjo+Pqgy6hOU1YbZHVolyTxU+Mg4AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T13:09:16.590594Z"},"content_sha256":"8ad172a01655e4ec6eaeac3f8a67dec440b7a1137a797e439a5d81b1c2b60a72","schema_version":"1.0","event_id":"sha256:8ad172a01655e4ec6eaeac3f8a67dec440b7a1137a797e439a5d81b1c2b60a72"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/URLNMTWQGZYSKCBX6ESL7GPZQZ/bundle.json","state_url":"https://pith.science/pith/URLNMTWQGZYSKCBX6ESL7GPZQZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/URLNMTWQGZYSKCBX6ESL7GPZQZ/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":"2026-06-09T13:09:16Z","links":{"resolver":"https://pith.science/pith/URLNMTWQGZYSKCBX6ESL7GPZQZ","bundle":"https://pith.science/pith/URLNMTWQGZYSKCBX6ESL7GPZQZ/bundle.json","state":"https://pith.science/pith/URLNMTWQGZYSKCBX6ESL7GPZQZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/URLNMTWQGZYSKCBX6ESL7GPZQZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:URLNMTWQGZYSKCBX6ESL7GPZQZ","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":"f532a9a2afdf22bef8141c8d73ba1a6e9b775ba6fbbf2c0b2c420b49173e253c","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-07-07T14:10:00Z","title_canon_sha256":"5577cf6dc66986b332c768d901b6b194386131ac4183222400e92a2ed4cd40d9"},"schema_version":"1.0","source":{"id":"1607.02027","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.02027","created_at":"2026-05-18T01:11:22Z"},{"alias_kind":"arxiv_version","alias_value":"1607.02027v1","created_at":"2026-05-18T01:11:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.02027","created_at":"2026-05-18T01:11:22Z"},{"alias_kind":"pith_short_12","alias_value":"URLNMTWQGZYS","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"URLNMTWQGZYSKCBX","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"URLNMTWQ","created_at":"2026-05-18T12:30:46Z"}],"graph_snapshots":[{"event_id":"sha256:8ad172a01655e4ec6eaeac3f8a67dec440b7a1137a797e439a5d81b1c2b60a72","target":"graph","created_at":"2026-05-18T01:11:22Z","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 two-photon production of photon pairs, i.e. the $\\gamma\\gamma\\to\\gamma\\gamma$ process, is studied. Different production modes regarding the elastic or inelastic coupling of the intermediate-state photons to the protons are considered. The semi-exclusive measurement, where one intact proton is registered by a dedicated forward proton detector, is discussed. As an example, the signal and background simulations are performed for the $\\gamma\\gamma\\to\\gamma\\gamma$ process mediated by the hypothetical 750 GeV resonance.","authors_text":"Janusz J. Chwastowski, Rafa{\\l} Staszewski","cross_cats":["hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-07-07T14:10:00Z","title":"On semi-exclusive measurement of $\\gamma\\gamma\\to\\gamma\\gamma$ scattering"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.02027","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:a8fd7f3f5ca24cf0baac2bf571ac24807c2814e8e5c5499b00aa908e748a603a","target":"record","created_at":"2026-05-18T01:11:22Z","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":"f532a9a2afdf22bef8141c8d73ba1a6e9b775ba6fbbf2c0b2c420b49173e253c","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-07-07T14:10:00Z","title_canon_sha256":"5577cf6dc66986b332c768d901b6b194386131ac4183222400e92a2ed4cd40d9"},"schema_version":"1.0","source":{"id":"1607.02027","kind":"arxiv","version":1}},"canonical_sha256":"a456d64ed03671250837f124bf99f9867f0330eb41fb8042180871f10c78f041","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a456d64ed03671250837f124bf99f9867f0330eb41fb8042180871f10c78f041","first_computed_at":"2026-05-18T01:11:22.747638Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:22.747638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vMY5quvP1T5AzqqgYFrRXtykLgKQiwxh3bI6yoVDjvPz2McliQ+OJtkch1I9BABS2uGKROwHXhOaTmNc8a/TDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:22.748278Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.02027","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a8fd7f3f5ca24cf0baac2bf571ac24807c2814e8e5c5499b00aa908e748a603a","sha256:8ad172a01655e4ec6eaeac3f8a67dec440b7a1137a797e439a5d81b1c2b60a72"],"state_sha256":"d7fa6a1cfc9793f23eafbb085cf81f3288834ec83ebdac8245c04e61c33ea280"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kz67um93L9kmim+g65AXIlUaMAz6YXIMsd/Meb5GwAmxk9ZjSymOPYkmNhMPlmZfyi9R/tVJQRWBL5eVyoj2BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T13:09:16.592609Z","bundle_sha256":"bca4d98f64d21e0792e1678f00b254b42aeb6dbc0abd5c42b34328d9a40bf82f"}}