{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:CZ74OOASQ42VTVVIPPGXHCO2DT","short_pith_number":"pith:CZ74OOAS","canonical_record":{"source":{"id":"2308.12458","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2023-08-23T22:48:02Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"5fe2a4d75c39f1a98554a4cb13e89d551485497648c018ba51b9f675e5c5f6c0","abstract_canon_sha256":"979387d29e8f16ca89a302a39651e75ddd2b28f1ebc4c797b182106839e96c65"},"schema_version":"1.0"},"canonical_sha256":"167fc73812873559d6a87bcd7389da1cfb00d35ff97975a00d23c63cf2c5dd13","source":{"kind":"arxiv","id":"2308.12458","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2308.12458","created_at":"2026-07-05T07:29:53Z"},{"alias_kind":"arxiv_version","alias_value":"2308.12458v2","created_at":"2026-07-05T07:29:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2308.12458","created_at":"2026-07-05T07:29:53Z"},{"alias_kind":"pith_short_12","alias_value":"CZ74OOASQ42V","created_at":"2026-07-05T07:29:53Z"},{"alias_kind":"pith_short_16","alias_value":"CZ74OOASQ42VTVVI","created_at":"2026-07-05T07:29:53Z"},{"alias_kind":"pith_short_8","alias_value":"CZ74OOAS","created_at":"2026-07-05T07:29:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:CZ74OOASQ42VTVVIPPGXHCO2DT","target":"record","payload":{"canonical_record":{"source":{"id":"2308.12458","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2023-08-23T22:48:02Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"5fe2a4d75c39f1a98554a4cb13e89d551485497648c018ba51b9f675e5c5f6c0","abstract_canon_sha256":"979387d29e8f16ca89a302a39651e75ddd2b28f1ebc4c797b182106839e96c65"},"schema_version":"1.0"},"canonical_sha256":"167fc73812873559d6a87bcd7389da1cfb00d35ff97975a00d23c63cf2c5dd13","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:29:53.772455Z","signature_b64":"kwkB0VU2H6c4XMHib+CexUsxltZsKYjYKVhA93qvz4I9MTc09sxq2TwPcefdMY3E3ixPfP85GeLjMOaw70POBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"167fc73812873559d6a87bcd7389da1cfb00d35ff97975a00d23c63cf2c5dd13","last_reissued_at":"2026-07-05T07:29:53.771965Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:29:53.771965Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2308.12458","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":"2026-07-05T07:29:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GgBrEP3Xs6pIMAhFBXPuTMOVZcMDLVfkdH0SxN9t//RQIGP/Nam0qpgQrZEy1ynPQ657/EaevMSPmTz4+crzAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T08:41:21.510394Z"},"content_sha256":"73db435c81076170b295ef759800402aab6d3ee0538029f81818346f594a92bf","schema_version":"1.0","event_id":"sha256:73db435c81076170b295ef759800402aab6d3ee0538029f81818346f594a92bf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:CZ74OOASQ42VTVVIPPGXHCO2DT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pion Transition Form Factor from Twisted-Mass Lattice QCD and the Hadronic Light-by-Light $\\pi^0$-pole Contribution to the Muon $g-2$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"hep-lat","authors_text":"A. Gasbarro, B. Kostrzewa, C. Alexandrou, C. Urbach, F. Pittler, F. Steffens, G. Bergner, G. Kanwar, G. Koutsou, J. Finkenrath, K. Hadjiyiannakou, K. Jansen, K. Ottnad, M. Petschlies, S. Bacchio, S. Burri, U. Wenger","submitted_at":"2023-08-23T22:48:02Z","abstract_excerpt":"The neutral pion generates the leading pole contribution to the hadronic light-by-light tensor, which is given in terms of the nonperturbative transition form factor $\\mathcal{F}_{\\pi^0\\gamma\\gamma}(q_1^2,q_2^2)$. Here we present an ab-initio lattice calculation of this quantity in the continuum and at the physical point using twisted-mass lattice QCD. We report our results for the transition form factor parameterized using a model-independent conformal expansion valid for arbitrary space-like kinematics and compare it with experimental measurements of the single-virtual form factor, the two-p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2308.12458","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2308.12458/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T07:29:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7LbjW0ufIevFhufmf9fFMy3+c2QxpvMK9/gDp46xz+VUmay7wHSmDg+ENSQv6/MGMT4to2wK5Cl1xdWtvAeqDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T08:41:21.511045Z"},"content_sha256":"3a82dec1184444e4e4e1360f8d27d2505aae1393270cc5fbb2e99824da27b954","schema_version":"1.0","event_id":"sha256:3a82dec1184444e4e4e1360f8d27d2505aae1393270cc5fbb2e99824da27b954"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CZ74OOASQ42VTVVIPPGXHCO2DT/bundle.json","state_url":"https://pith.science/pith/CZ74OOASQ42VTVVIPPGXHCO2DT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CZ74OOASQ42VTVVIPPGXHCO2DT/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":"2026-08-12T08:41:21Z","links":{"resolver":"https://pith.science/pith/CZ74OOASQ42VTVVIPPGXHCO2DT","bundle":"https://pith.science/pith/CZ74OOASQ42VTVVIPPGXHCO2DT/bundle.json","state":"https://pith.science/pith/CZ74OOASQ42VTVVIPPGXHCO2DT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CZ74OOASQ42VTVVIPPGXHCO2DT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:CZ74OOASQ42VTVVIPPGXHCO2DT","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":"979387d29e8f16ca89a302a39651e75ddd2b28f1ebc4c797b182106839e96c65","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2023-08-23T22:48:02Z","title_canon_sha256":"5fe2a4d75c39f1a98554a4cb13e89d551485497648c018ba51b9f675e5c5f6c0"},"schema_version":"1.0","source":{"id":"2308.12458","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2308.12458","created_at":"2026-07-05T07:29:53Z"},{"alias_kind":"arxiv_version","alias_value":"2308.12458v2","created_at":"2026-07-05T07:29:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2308.12458","created_at":"2026-07-05T07:29:53Z"},{"alias_kind":"pith_short_12","alias_value":"CZ74OOASQ42V","created_at":"2026-07-05T07:29:53Z"},{"alias_kind":"pith_short_16","alias_value":"CZ74OOASQ42VTVVI","created_at":"2026-07-05T07:29:53Z"},{"alias_kind":"pith_short_8","alias_value":"CZ74OOAS","created_at":"2026-07-05T07:29:53Z"}],"graph_snapshots":[{"event_id":"sha256:3a82dec1184444e4e4e1360f8d27d2505aae1393270cc5fbb2e99824da27b954","target":"graph","created_at":"2026-07-05T07:29:53Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2308.12458/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The neutral pion generates the leading pole contribution to the hadronic light-by-light tensor, which is given in terms of the nonperturbative transition form factor $\\mathcal{F}_{\\pi^0\\gamma\\gamma}(q_1^2,q_2^2)$. Here we present an ab-initio lattice calculation of this quantity in the continuum and at the physical point using twisted-mass lattice QCD. We report our results for the transition form factor parameterized using a model-independent conformal expansion valid for arbitrary space-like kinematics and compare it with experimental measurements of the single-virtual form factor, the two-p","authors_text":"A. Gasbarro, B. Kostrzewa, C. Alexandrou, C. Urbach, F. Pittler, F. Steffens, G. Bergner, G. Kanwar, G. Koutsou, J. Finkenrath, K. Hadjiyiannakou, K. Jansen, K. Ottnad, M. Petschlies, S. Bacchio, S. Burri, U. Wenger","cross_cats":["hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2023-08-23T22:48:02Z","title":"Pion Transition Form Factor from Twisted-Mass Lattice QCD and the Hadronic Light-by-Light $\\pi^0$-pole Contribution to the Muon $g-2$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2308.12458","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":"sha256:73db435c81076170b295ef759800402aab6d3ee0538029f81818346f594a92bf","target":"record","created_at":"2026-07-05T07:29:53Z","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":"979387d29e8f16ca89a302a39651e75ddd2b28f1ebc4c797b182106839e96c65","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2023-08-23T22:48:02Z","title_canon_sha256":"5fe2a4d75c39f1a98554a4cb13e89d551485497648c018ba51b9f675e5c5f6c0"},"schema_version":"1.0","source":{"id":"2308.12458","kind":"arxiv","version":2}},"canonical_sha256":"167fc73812873559d6a87bcd7389da1cfb00d35ff97975a00d23c63cf2c5dd13","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"167fc73812873559d6a87bcd7389da1cfb00d35ff97975a00d23c63cf2c5dd13","first_computed_at":"2026-07-05T07:29:53.771965Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:29:53.771965Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kwkB0VU2H6c4XMHib+CexUsxltZsKYjYKVhA93qvz4I9MTc09sxq2TwPcefdMY3E3ixPfP85GeLjMOaw70POBA==","signature_status":"signed_v1","signed_at":"2026-07-05T07:29:53.772455Z","signed_message":"canonical_sha256_bytes"},"source_id":"2308.12458","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:73db435c81076170b295ef759800402aab6d3ee0538029f81818346f594a92bf","sha256:3a82dec1184444e4e4e1360f8d27d2505aae1393270cc5fbb2e99824da27b954"],"state_sha256":"f9a1d4cb67895bba4423bbf9e4eeccde2bf68606529fac2d1efa9070690efa22"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J/m2LyvXOCgVjS9hy0tDO7Jikz6QgTk0ntd3ALfTEg9EJbIcKIXjNLVtwleQqbcR5TxZZ1P3dfJXsti4M4a2Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T08:41:21.516764Z","bundle_sha256":"f4d6407e2dfc2b5b9b7bb90ec1cc2af70f434e73e64f034af586a0c21b31b3bc"}}