{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:WMOLTXSCWZVS4NKMHYN5OVWA3P","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":"2fda42e93137e0764a21230d1221861bd84c0d8736fc700859794d31ba23667d","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2022-02-24T09:25:23Z","title_canon_sha256":"d22ba71e05a903fbad57bb32f2dcb7d9d13dff020a58da558c84fabd99db439e"},"schema_version":"1.0","source":{"id":"2202.11970","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2202.11970","created_at":"2026-07-05T04:41:32Z"},{"alias_kind":"arxiv_version","alias_value":"2202.11970v1","created_at":"2026-07-05T04:41:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2202.11970","created_at":"2026-07-05T04:41:32Z"},{"alias_kind":"pith_short_12","alias_value":"WMOLTXSCWZVS","created_at":"2026-07-05T04:41:32Z"},{"alias_kind":"pith_short_16","alias_value":"WMOLTXSCWZVS4NKM","created_at":"2026-07-05T04:41:32Z"},{"alias_kind":"pith_short_8","alias_value":"WMOLTXSC","created_at":"2026-07-05T04:41:32Z"}],"graph_snapshots":[{"event_id":"sha256:a8cd71b050df9e1f9e2bd50b4f0713164cf576a6bf941d09d1659a4f37b32339","target":"graph","created_at":"2026-07-05T04:41:32Z","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/2202.11970/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a lattice calculation of the charged/neutral pion mass difference $M_{\\pi^{+}}-M_{\\pi^{0}}$ at order $\\mathcal{O}(\\alpha_{em})$ using the gauge configurations produced by the Extended Twisted Mass Collaboration with $N_{f}=2+1+1$ dynamical quark flavours at three values of the lattice spacing ($a \\simeq 0.062, 0.082, 0.089~{\\rm fm}$) and pion masses in the range $M_{\\pi} \\simeq 250-500~{\\rm MeV}$. We employ the RM123 method and expand the path-integral around the isospin symmetric point at leading order in the electromagnetic coupling $\\alpha_{em}$. Making use of the recently propos","authors_text":"F. Sanfilippo, G. Gagliardi, G. Martinelli, R. Frezzotti, S. Simula, V. Lubicz","cross_cats":["hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2022-02-24T09:25:23Z","title":"Lattice calculation of the pion mass difference $M_{\\pi^{+}}-M_{\\pi^{0}}$ at order $\\mathcal{O}(\\alpha_{em})$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2202.11970","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:e49e3ea421bdb7f4a921346bd39e556e41429d44c5715a5dfd1298e0c3d9145a","target":"record","created_at":"2026-07-05T04:41:32Z","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":"2fda42e93137e0764a21230d1221861bd84c0d8736fc700859794d31ba23667d","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2022-02-24T09:25:23Z","title_canon_sha256":"d22ba71e05a903fbad57bb32f2dcb7d9d13dff020a58da558c84fabd99db439e"},"schema_version":"1.0","source":{"id":"2202.11970","kind":"arxiv","version":1}},"canonical_sha256":"b31cb9de42b66b2e354c3e1bd756c0dbc93d6869764555c252c6523e95178598","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b31cb9de42b66b2e354c3e1bd756c0dbc93d6869764555c252c6523e95178598","first_computed_at":"2026-07-05T04:41:32.968751Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:41:32.968751Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"creyX4TR3n7986VRsk5r/PBcsbTPnBFhXV1DJFAkABSbM1xkga/jz09elr2MoRsnDrDIxnNUvrJuBtfFnffHCA==","signature_status":"signed_v1","signed_at":"2026-07-05T04:41:32.969202Z","signed_message":"canonical_sha256_bytes"},"source_id":"2202.11970","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e49e3ea421bdb7f4a921346bd39e556e41429d44c5715a5dfd1298e0c3d9145a","sha256:a8cd71b050df9e1f9e2bd50b4f0713164cf576a6bf941d09d1659a4f37b32339"],"state_sha256":"9c0633cb8ad4268e65c0f01eea0dbeead1c21d0d9c3394c2f459ee989a33cf5d"}