{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:BZZS7F247PSUVTDY5EDZJRUQWF","short_pith_number":"pith:BZZS7F24","canonical_record":{"source":{"id":"2512.06090","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"hep-ph","submitted_at":"2025-12-05T19:02:15Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"7cfef6cb208a72535d3d0c7562b1f2092d3691bc6dc8e04990b6e6daf4f00587","abstract_canon_sha256":"12c66cd01637f591402d43333d430d61bf61ab7b5e0851d6a040c4e23dccc573"},"schema_version":"1.0"},"canonical_sha256":"0e732f975cfbe54acc78e90794c690b17731e467fb75418674b91bfcc7f1186a","source":{"kind":"arxiv","id":"2512.06090","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2512.06090","created_at":"2026-06-23T01:12:50Z"},{"alias_kind":"arxiv_version","alias_value":"2512.06090v2","created_at":"2026-06-23T01:12:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2512.06090","created_at":"2026-06-23T01:12:50Z"},{"alias_kind":"pith_short_12","alias_value":"BZZS7F247PSU","created_at":"2026-06-23T01:12:50Z"},{"alias_kind":"pith_short_16","alias_value":"BZZS7F247PSUVTDY","created_at":"2026-06-23T01:12:50Z"},{"alias_kind":"pith_short_8","alias_value":"BZZS7F24","created_at":"2026-06-23T01:12:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:BZZS7F247PSUVTDY5EDZJRUQWF","target":"record","payload":{"canonical_record":{"source":{"id":"2512.06090","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"hep-ph","submitted_at":"2025-12-05T19:02:15Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"7cfef6cb208a72535d3d0c7562b1f2092d3691bc6dc8e04990b6e6daf4f00587","abstract_canon_sha256":"12c66cd01637f591402d43333d430d61bf61ab7b5e0851d6a040c4e23dccc573"},"schema_version":"1.0"},"canonical_sha256":"0e732f975cfbe54acc78e90794c690b17731e467fb75418674b91bfcc7f1186a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-23T01:12:50.527973Z","signature_b64":"2/Q6iauwicHH1O4vV61FsRoS5SZm2T+ApSL1aH9G09OstPp6nAvVkHjngiFS5QSB9qOJhDqnaKVvUrPD/1KVBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0e732f975cfbe54acc78e90794c690b17731e467fb75418674b91bfcc7f1186a","last_reissued_at":"2026-06-23T01:12:50.527386Z","signature_status":"signed_v1","first_computed_at":"2026-06-23T01:12:50.527386Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2512.06090","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":"2026-06-23T01:12:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L6lI5M7zm1p9WAIhEqi7BSejY0HQAOcc/N4UP7Jg3gQ3ouG8mjP5dnx7MXKwa0DkNVyZhWEgb9FREF5qivGpBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-01T21:09:01.991680Z"},"content_sha256":"781a1fe05668d6db3acca19722a1dde3654b78c037421db049d555a583e891c9","schema_version":"1.0","event_id":"sha256:781a1fe05668d6db3acca19722a1dde3654b78c037421db049d555a583e891c9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:BZZS7F247PSUVTDY5EDZJRUQWF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Photon emission from weakly magnetized neutral pions","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"hep-ph","authors_text":"Fan Lin, Igor Shovkovy, Xinyang Wang","submitted_at":"2025-12-05T19:02:15Z","abstract_excerpt":"Using a hadronic framework, we derive an explicit expression for photon production from neutral pions in a weak background magnetic field. Our calculation is built on the proton triangle diagram with an effective Yukawa $\\pi^0$-proton coupling, offering an alternative to quark-level descriptions that is advantageous when the magnetic length greatly exceeds the proton size. Corrections to the pion decay constant are computed up to second order in the magnetic-field strength, revealing that the field generally suppresses the decay rate. Quantitatively, however, the effect remains modest even for"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2512.06090","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/2512.06090/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":"2026-06-23T01:12:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4d5xxQCcUXun+ewJSZKt6axdJdpLRdSjnoU9qOjfmhUcAPluLj74qig4eKrsWRdrK30F61HEIk0SJMPOodoeDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-01T21:09:01.992056Z"},"content_sha256":"eb5498d3738933f77d94c0e18c7c5ce5902e0d40c32eeab4f894c5a374bb47d3","schema_version":"1.0","event_id":"sha256:eb5498d3738933f77d94c0e18c7c5ce5902e0d40c32eeab4f894c5a374bb47d3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BZZS7F247PSUVTDY5EDZJRUQWF/bundle.json","state_url":"https://pith.science/pith/BZZS7F247PSUVTDY5EDZJRUQWF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BZZS7F247PSUVTDY5EDZJRUQWF/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":"2026-07-01T21:09:01Z","links":{"resolver":"https://pith.science/pith/BZZS7F247PSUVTDY5EDZJRUQWF","bundle":"https://pith.science/pith/BZZS7F247PSUVTDY5EDZJRUQWF/bundle.json","state":"https://pith.science/pith/BZZS7F247PSUVTDY5EDZJRUQWF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BZZS7F247PSUVTDY5EDZJRUQWF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:BZZS7F247PSUVTDY5EDZJRUQWF","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":"12c66cd01637f591402d43333d430d61bf61ab7b5e0851d6a040c4e23dccc573","cross_cats_sorted":["nucl-th"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"hep-ph","submitted_at":"2025-12-05T19:02:15Z","title_canon_sha256":"7cfef6cb208a72535d3d0c7562b1f2092d3691bc6dc8e04990b6e6daf4f00587"},"schema_version":"1.0","source":{"id":"2512.06090","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2512.06090","created_at":"2026-06-23T01:12:50Z"},{"alias_kind":"arxiv_version","alias_value":"2512.06090v2","created_at":"2026-06-23T01:12:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2512.06090","created_at":"2026-06-23T01:12:50Z"},{"alias_kind":"pith_short_12","alias_value":"BZZS7F247PSU","created_at":"2026-06-23T01:12:50Z"},{"alias_kind":"pith_short_16","alias_value":"BZZS7F247PSUVTDY","created_at":"2026-06-23T01:12:50Z"},{"alias_kind":"pith_short_8","alias_value":"BZZS7F24","created_at":"2026-06-23T01:12:50Z"}],"graph_snapshots":[{"event_id":"sha256:eb5498d3738933f77d94c0e18c7c5ce5902e0d40c32eeab4f894c5a374bb47d3","target":"graph","created_at":"2026-06-23T01:12:50Z","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/2512.06090/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Using a hadronic framework, we derive an explicit expression for photon production from neutral pions in a weak background magnetic field. Our calculation is built on the proton triangle diagram with an effective Yukawa $\\pi^0$-proton coupling, offering an alternative to quark-level descriptions that is advantageous when the magnetic length greatly exceeds the proton size. Corrections to the pion decay constant are computed up to second order in the magnetic-field strength, revealing that the field generally suppresses the decay rate. Quantitatively, however, the effect remains modest even for","authors_text":"Fan Lin, Igor Shovkovy, Xinyang Wang","cross_cats":["nucl-th"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"hep-ph","submitted_at":"2025-12-05T19:02:15Z","title":"Photon emission from weakly magnetized neutral pions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2512.06090","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":"sha256:781a1fe05668d6db3acca19722a1dde3654b78c037421db049d555a583e891c9","target":"record","created_at":"2026-06-23T01:12:50Z","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":"12c66cd01637f591402d43333d430d61bf61ab7b5e0851d6a040c4e23dccc573","cross_cats_sorted":["nucl-th"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"hep-ph","submitted_at":"2025-12-05T19:02:15Z","title_canon_sha256":"7cfef6cb208a72535d3d0c7562b1f2092d3691bc6dc8e04990b6e6daf4f00587"},"schema_version":"1.0","source":{"id":"2512.06090","kind":"arxiv","version":2}},"canonical_sha256":"0e732f975cfbe54acc78e90794c690b17731e467fb75418674b91bfcc7f1186a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0e732f975cfbe54acc78e90794c690b17731e467fb75418674b91bfcc7f1186a","first_computed_at":"2026-06-23T01:12:50.527386Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-23T01:12:50.527386Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2/Q6iauwicHH1O4vV61FsRoS5SZm2T+ApSL1aH9G09OstPp6nAvVkHjngiFS5QSB9qOJhDqnaKVvUrPD/1KVBQ==","signature_status":"signed_v1","signed_at":"2026-06-23T01:12:50.527973Z","signed_message":"canonical_sha256_bytes"},"source_id":"2512.06090","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:781a1fe05668d6db3acca19722a1dde3654b78c037421db049d555a583e891c9","sha256:eb5498d3738933f77d94c0e18c7c5ce5902e0d40c32eeab4f894c5a374bb47d3"],"state_sha256":"60e5c87e69759ad3e16547ca2653551d5fa2dd1972be6d0869f14fe5c4399f18"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"toV6ypZPjs2uXge4iHzfuQlCVk2Gq7UymSixi6VW9tk4vlJjmcakpz9SBMm+oUbZ/8n4G8I26seXMJTzjZMKAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-01T21:09:01.996768Z","bundle_sha256":"a2757baf5b1a00b7da8be736e5f5257c84d525e026a6479a18dc47773636b4f4"}}