{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2003:KG6NO6YPO3NHODYW5GMNHT7Q4M","short_pith_number":"pith:KG6NO6YP","canonical_record":{"source":{"id":"hep-ex/0308055","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ex","submitted_at":"2003-08-21T21:32:33Z","cross_cats_sorted":[],"title_canon_sha256":"bf15c46a7fb12ceb551dfa934794b58f1066f6cf27962a6cb71e40f448f5606b","abstract_canon_sha256":"e3f5457d3ae885129c7858e5d4db8909ef9499e2c316227d413003f9c91d6f05"},"schema_version":"1.0"},"canonical_sha256":"51bcd77b0f76da770f16e998d3cff0e33c2bbf42371468e94c95d6d4d423a3e0","source":{"kind":"arxiv","id":"hep-ex/0308055","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ex/0308055","created_at":"2026-05-18T03:47:31Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ex/0308055v1","created_at":"2026-05-18T03:47:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ex/0308055","created_at":"2026-05-18T03:47:31Z"},{"alias_kind":"pith_short_12","alias_value":"KG6NO6YPO3NH","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"KG6NO6YPO3NHODYW","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"KG6NO6YP","created_at":"2026-05-18T12:25:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2003:KG6NO6YPO3NHODYW5GMNHT7Q4M","target":"record","payload":{"canonical_record":{"source":{"id":"hep-ex/0308055","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ex","submitted_at":"2003-08-21T21:32:33Z","cross_cats_sorted":[],"title_canon_sha256":"bf15c46a7fb12ceb551dfa934794b58f1066f6cf27962a6cb71e40f448f5606b","abstract_canon_sha256":"e3f5457d3ae885129c7858e5d4db8909ef9499e2c316227d413003f9c91d6f05"},"schema_version":"1.0"},"canonical_sha256":"51bcd77b0f76da770f16e998d3cff0e33c2bbf42371468e94c95d6d4d423a3e0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:47:31.776558Z","signature_b64":"i6lW2Dl1pNASbG5ts3Qp2Lh8m/RJ5OsGR3BY+CMtAvv4XhoU74chDkGL+wNrLf2gdkcz1IR47p52RQgT9ftUDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"51bcd77b0f76da770f16e998d3cff0e33c2bbf42371468e94c95d6d4d423a3e0","last_reissued_at":"2026-05-18T03:47:31.775872Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:47:31.775872Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-ex/0308055","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":"2026-05-18T03:47:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k92o2wVIdQtPcfrfD4sEEQb3WxvXziQ7zJg2+3j4xwSUpaLkhBz5EEDqn9MNILXKRPGXapO5QwS5dm6yz9MeBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T23:05:29.638445Z"},"content_sha256":"a849118c4facb9cf2087ffef5efa750b04e7ce86b076616c53551457c3059e7b","schema_version":"1.0","event_id":"sha256:a849118c4facb9cf2087ffef5efa750b04e7ce86b076616c53551457c3059e7b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2003:KG6NO6YPO3NHODYW5GMNHT7Q4M","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Interference Study of the chi_c0 (1^3P_0) in the Reaction Proton-Antiproton -> pi^0 pi^0","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"Fermilab E835 Collaboration","submitted_at":"2003-08-21T21:32:33Z","abstract_excerpt":"Fermilab experiment E835 has observed proton-antiproton annihilation production of the charmonium state chi_c0 and its subsequent decay into pi^0 pi^0. Although the resonant amplitude is an order of magnitude smaller than that of the non-resonant continuum production of pi^0 pi^0, an enhanced interference signal is evident. A partial wave expansion is used to extract physics parameters. The amplitudes J=0 and 2, of comparable strength, dominate the expansion. Both are accessed by L=1 in the entrance proton-antiproton channel. The product of the input and output branching fractions is determine"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/0308055","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":"2026-05-18T03:47:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qz8CS4/6mTrk5juWb8ptu3fHeuGcLR51oY0mMAL3jnRVGwTFXwQAEZzsgewCc9Y1bEyN095s7L8Vh1WZDRXGAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T23:05:29.639128Z"},"content_sha256":"07c8e5bdb1b0d9a5bf6d01bf2c7fb8cf9c12eaf1a73fcd0aa0feacdd759a1bf5","schema_version":"1.0","event_id":"sha256:07c8e5bdb1b0d9a5bf6d01bf2c7fb8cf9c12eaf1a73fcd0aa0feacdd759a1bf5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KG6NO6YPO3NHODYW5GMNHT7Q4M/bundle.json","state_url":"https://pith.science/pith/KG6NO6YPO3NHODYW5GMNHT7Q4M/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KG6NO6YPO3NHODYW5GMNHT7Q4M/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":"2026-05-31T23:05:29Z","links":{"resolver":"https://pith.science/pith/KG6NO6YPO3NHODYW5GMNHT7Q4M","bundle":"https://pith.science/pith/KG6NO6YPO3NHODYW5GMNHT7Q4M/bundle.json","state":"https://pith.science/pith/KG6NO6YPO3NHODYW5GMNHT7Q4M/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KG6NO6YPO3NHODYW5GMNHT7Q4M/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:KG6NO6YPO3NHODYW5GMNHT7Q4M","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":"e3f5457d3ae885129c7858e5d4db8909ef9499e2c316227d413003f9c91d6f05","cross_cats_sorted":[],"license":"","primary_cat":"hep-ex","submitted_at":"2003-08-21T21:32:33Z","title_canon_sha256":"bf15c46a7fb12ceb551dfa934794b58f1066f6cf27962a6cb71e40f448f5606b"},"schema_version":"1.0","source":{"id":"hep-ex/0308055","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ex/0308055","created_at":"2026-05-18T03:47:31Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ex/0308055v1","created_at":"2026-05-18T03:47:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ex/0308055","created_at":"2026-05-18T03:47:31Z"},{"alias_kind":"pith_short_12","alias_value":"KG6NO6YPO3NH","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"KG6NO6YPO3NHODYW","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"KG6NO6YP","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:07c8e5bdb1b0d9a5bf6d01bf2c7fb8cf9c12eaf1a73fcd0aa0feacdd759a1bf5","target":"graph","created_at":"2026-05-18T03:47:31Z","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":"Fermilab experiment E835 has observed proton-antiproton annihilation production of the charmonium state chi_c0 and its subsequent decay into pi^0 pi^0. Although the resonant amplitude is an order of magnitude smaller than that of the non-resonant continuum production of pi^0 pi^0, an enhanced interference signal is evident. A partial wave expansion is used to extract physics parameters. The amplitudes J=0 and 2, of comparable strength, dominate the expansion. Both are accessed by L=1 in the entrance proton-antiproton channel. The product of the input and output branching fractions is determine","authors_text":"Fermilab E835 Collaboration","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ex","submitted_at":"2003-08-21T21:32:33Z","title":"Interference Study of the chi_c0 (1^3P_0) in the Reaction Proton-Antiproton -> pi^0 pi^0"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/0308055","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:a849118c4facb9cf2087ffef5efa750b04e7ce86b076616c53551457c3059e7b","target":"record","created_at":"2026-05-18T03:47:31Z","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":"e3f5457d3ae885129c7858e5d4db8909ef9499e2c316227d413003f9c91d6f05","cross_cats_sorted":[],"license":"","primary_cat":"hep-ex","submitted_at":"2003-08-21T21:32:33Z","title_canon_sha256":"bf15c46a7fb12ceb551dfa934794b58f1066f6cf27962a6cb71e40f448f5606b"},"schema_version":"1.0","source":{"id":"hep-ex/0308055","kind":"arxiv","version":1}},"canonical_sha256":"51bcd77b0f76da770f16e998d3cff0e33c2bbf42371468e94c95d6d4d423a3e0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"51bcd77b0f76da770f16e998d3cff0e33c2bbf42371468e94c95d6d4d423a3e0","first_computed_at":"2026-05-18T03:47:31.775872Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:47:31.775872Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"i6lW2Dl1pNASbG5ts3Qp2Lh8m/RJ5OsGR3BY+CMtAvv4XhoU74chDkGL+wNrLf2gdkcz1IR47p52RQgT9ftUDw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:47:31.776558Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ex/0308055","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a849118c4facb9cf2087ffef5efa750b04e7ce86b076616c53551457c3059e7b","sha256:07c8e5bdb1b0d9a5bf6d01bf2c7fb8cf9c12eaf1a73fcd0aa0feacdd759a1bf5"],"state_sha256":"28638ac6e7a3e4d83fc847be3158df1dd9df7615e1af8b590d0ae2c0b9d766a9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3MYhc2TnmViMaSEvzPYe8Nv14ewvWovhP5bODbE5LSkeetZan+aFnkxxwHFJZIo/nhaBaTktBsXbjkJwikpaCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T23:05:29.642808Z","bundle_sha256":"90e0b1190d2d78fc84c04539a22dc57b5be751685dc4fc2c6dcc6b2422a883ea"}}