{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:Q7NULDCD434AKNTMKNIBE6ZFNA","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":"ec03c61cf465079a8c97de7f5b0a9d66b63e5d6c6ec91a3570f5e2c77dc5bebd","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-05-17T03:51:24Z","title_canon_sha256":"05e0bf60254b4360d5719da44b83465bdcdeb512e93e6ab04dad17d4eba3577f"},"schema_version":"1.0","source":{"id":"1205.5292","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.5292","created_at":"2026-05-18T02:21:09Z"},{"alias_kind":"arxiv_version","alias_value":"1205.5292v1","created_at":"2026-05-18T02:21:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.5292","created_at":"2026-05-18T02:21:09Z"},{"alias_kind":"pith_short_12","alias_value":"Q7NULDCD434A","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"Q7NULDCD434AKNTM","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"Q7NULDCD","created_at":"2026-05-18T12:27:18Z"}],"graph_snapshots":[{"event_id":"sha256:78fa80e9bbae2d95d21b04663769b3f45f8b1e7298b54ded6a8aeca3e481b6f0","target":"graph","created_at":"2026-05-18T02:21:09Z","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":"We studied the feasibility of the measurement of Higgs pair creation at a Photon Linear Collider (PLC). From the sensitivity to the anomalous self-coupling of the Higgs boson, the optimum $\\gamma \\gamma$ collision energy was found to be around 270 GeV for a Higgs mass of 120 GeV/$c^2$. We found that large backgrounds such as $\\gamma \\gamma \\rightarrow W^+W^-, ZZ,$ and $b\\bar{b}b\\bar{b}$, can be suppressed if correct assignment of tracks to parent partons is achieved and Higgs pair events can be observed with a statistical significance of $\\sim 5 \\sigma$ by operating the PLC for 5 years.","authors_text":"Daisuke Harada, Katsumasa Ikematsu, Keisuke Fujii, Koji Tsumura, Nozomi Maeda, Shin-ichi Kawada, Shinya Kanemura, Tohru Takahashi, Yoshimasa Kurihara","cross_cats":["hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-05-17T03:51:24Z","title":"A feasibility study of the measurement of Higgs pair creation at a Photon Linear Collider"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.5292","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:fe35191e6363f822442ee9d5c10bdada89e345c0f263faccdaf7eaf42cfd62a5","target":"record","created_at":"2026-05-18T02:21:09Z","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":"ec03c61cf465079a8c97de7f5b0a9d66b63e5d6c6ec91a3570f5e2c77dc5bebd","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-05-17T03:51:24Z","title_canon_sha256":"05e0bf60254b4360d5719da44b83465bdcdeb512e93e6ab04dad17d4eba3577f"},"schema_version":"1.0","source":{"id":"1205.5292","kind":"arxiv","version":1}},"canonical_sha256":"87db458c43e6f805366c5350127b256826953d21b0f36ff3ea6abf2dd390928b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"87db458c43e6f805366c5350127b256826953d21b0f36ff3ea6abf2dd390928b","first_computed_at":"2026-05-18T02:21:09.849498Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:21:09.849498Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gdGldqGkaavkdO8Oh01gacWdDM/xHcFi/gbGAkp9OtboUXM18nH6dCdfqc8qz5RGqckmGlPAwTrPnpp9haWxAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:21:09.849991Z","signed_message":"canonical_sha256_bytes"},"source_id":"1205.5292","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fe35191e6363f822442ee9d5c10bdada89e345c0f263faccdaf7eaf42cfd62a5","sha256:78fa80e9bbae2d95d21b04663769b3f45f8b1e7298b54ded6a8aeca3e481b6f0"],"state_sha256":"1cfbd8e12f520da3d2e764878baf9c5f8957a51e3e4bad8d45cec3579288d2d0"}