{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:F2KRVB7TYN2DS25DRVXXIZM7YY","short_pith_number":"pith:F2KRVB7T","canonical_record":{"source":{"id":"2602.11263","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2026-02-11T19:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"41ed2c642165a690af1bab9f823ae3930c713e97c849ab2b002c4f2bb935a1ac","abstract_canon_sha256":"4e0f48759512ba12057a638505545a0661ad2a1c9981f86e839f9de4184edcb4"},"schema_version":"1.0"},"canonical_sha256":"2e951a87f3c374396ba38d6f74659fc63de3968d3420eb3cb679ebbd13ed5ad7","source":{"kind":"arxiv","id":"2602.11263","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.11263","created_at":"2026-07-17T00:20:44Z"},{"alias_kind":"arxiv_version","alias_value":"2602.11263v1","created_at":"2026-07-17T00:20:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.11263","created_at":"2026-07-17T00:20:44Z"},{"alias_kind":"pith_short_12","alias_value":"F2KRVB7TYN2D","created_at":"2026-07-17T00:20:44Z"},{"alias_kind":"pith_short_16","alias_value":"F2KRVB7TYN2DS25D","created_at":"2026-07-17T00:20:44Z"},{"alias_kind":"pith_short_8","alias_value":"F2KRVB7T","created_at":"2026-07-17T00:20:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:F2KRVB7TYN2DS25DRVXXIZM7YY","target":"record","payload":{"canonical_record":{"source":{"id":"2602.11263","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2026-02-11T19:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"41ed2c642165a690af1bab9f823ae3930c713e97c849ab2b002c4f2bb935a1ac","abstract_canon_sha256":"4e0f48759512ba12057a638505545a0661ad2a1c9981f86e839f9de4184edcb4"},"schema_version":"1.0"},"canonical_sha256":"2e951a87f3c374396ba38d6f74659fc63de3968d3420eb3cb679ebbd13ed5ad7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-17T00:20:44.697462Z","signature_b64":"DsB2iwFis4FpktIfWwuEMpCuAarWR6TfqEBQeLBhl0nqrJiLJ9LnayyGbyHy22Hp3HkZTVSMMHW1IXm9vgPDAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2e951a87f3c374396ba38d6f74659fc63de3968d3420eb3cb679ebbd13ed5ad7","last_reissued_at":"2026-07-17T00:20:44.696536Z","signature_status":"signed_v1","first_computed_at":"2026-07-17T00:20:44.696536Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2602.11263","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":"2026-07-17T00:20:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VzTdcbednbU0WXobuZ0cwUvmNs2Raw1YvOLlUML19j/LO49NtCsTrQ7dpLxaEwlDa5oLKZdUEoJ4OMpAnIHgBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T17:02:04.877358Z"},"content_sha256":"a3e13601ad19eb0afbbd4be8988100f0f1fb6676a4007a5b88df393240e0de28","schema_version":"1.0","event_id":"sha256:a3e13601ad19eb0afbbd4be8988100f0f1fb6676a4007a5b88df393240e0de28"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:F2KRVB7TYN2DS25DRVXXIZM7YY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The X17 with Chiral Couplings","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Max H. Fieg, Mi\\v{s}a Toman, Tim M.P. Tait, Toni M\\\"akel\\\"a","submitted_at":"2026-02-11T19:00:01Z","abstract_excerpt":"In recent years, the ATOMKI collaboration has performed a series of measurements of excited nuclei, observing a resonant excess of electron-positron pairs at large opening angles compared to the Standard Model prediction. The excess has been hypothesized to be due to the production of a new spin-1 or spin-0 particle, X17, with a mass of about 17 MeV. Recently, the PADME experiment has reported an excess in the $e^+e^-$ cross section at center-of-mass energies near 17 MeV, perhaps further hinting at the existence of a new state. Studies of the spin-1 case have hitherto focused on either vector "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.11263","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2602.11263/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":"2026-07-17T00:20:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+2HHGRKoeezHT7pIm+ZjKboZMXZsv+PQqjEOpXqmbcvNZYEtxFhhTv9xYuGF3rUO9FyWySZsdeb9mG1xwu2nBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T17:02:04.878024Z"},"content_sha256":"29b8327e26ee493b243c496edd7d149c86e9080387cfa36239c18f5da3804516","schema_version":"1.0","event_id":"sha256:29b8327e26ee493b243c496edd7d149c86e9080387cfa36239c18f5da3804516"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/F2KRVB7TYN2DS25DRVXXIZM7YY/bundle.json","state_url":"https://pith.science/pith/F2KRVB7TYN2DS25DRVXXIZM7YY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/F2KRVB7TYN2DS25DRVXXIZM7YY/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":"2026-08-04T17:02:04Z","links":{"resolver":"https://pith.science/pith/F2KRVB7TYN2DS25DRVXXIZM7YY","bundle":"https://pith.science/pith/F2KRVB7TYN2DS25DRVXXIZM7YY/bundle.json","state":"https://pith.science/pith/F2KRVB7TYN2DS25DRVXXIZM7YY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/F2KRVB7TYN2DS25DRVXXIZM7YY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:F2KRVB7TYN2DS25DRVXXIZM7YY","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":"4e0f48759512ba12057a638505545a0661ad2a1c9981f86e839f9de4184edcb4","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2026-02-11T19:00:01Z","title_canon_sha256":"41ed2c642165a690af1bab9f823ae3930c713e97c849ab2b002c4f2bb935a1ac"},"schema_version":"1.0","source":{"id":"2602.11263","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.11263","created_at":"2026-07-17T00:20:44Z"},{"alias_kind":"arxiv_version","alias_value":"2602.11263v1","created_at":"2026-07-17T00:20:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.11263","created_at":"2026-07-17T00:20:44Z"},{"alias_kind":"pith_short_12","alias_value":"F2KRVB7TYN2D","created_at":"2026-07-17T00:20:44Z"},{"alias_kind":"pith_short_16","alias_value":"F2KRVB7TYN2DS25D","created_at":"2026-07-17T00:20:44Z"},{"alias_kind":"pith_short_8","alias_value":"F2KRVB7T","created_at":"2026-07-17T00:20:44Z"}],"graph_snapshots":[{"event_id":"sha256:29b8327e26ee493b243c496edd7d149c86e9080387cfa36239c18f5da3804516","target":"graph","created_at":"2026-07-17T00:20:44Z","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/2602.11263/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In recent years, the ATOMKI collaboration has performed a series of measurements of excited nuclei, observing a resonant excess of electron-positron pairs at large opening angles compared to the Standard Model prediction. The excess has been hypothesized to be due to the production of a new spin-1 or spin-0 particle, X17, with a mass of about 17 MeV. Recently, the PADME experiment has reported an excess in the $e^+e^-$ cross section at center-of-mass energies near 17 MeV, perhaps further hinting at the existence of a new state. Studies of the spin-1 case have hitherto focused on either vector ","authors_text":"Max H. Fieg, Mi\\v{s}a Toman, Tim M.P. Tait, Toni M\\\"akel\\\"a","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2026-02-11T19:00:01Z","title":"The X17 with Chiral Couplings"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.11263","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:a3e13601ad19eb0afbbd4be8988100f0f1fb6676a4007a5b88df393240e0de28","target":"record","created_at":"2026-07-17T00:20:44Z","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":"4e0f48759512ba12057a638505545a0661ad2a1c9981f86e839f9de4184edcb4","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2026-02-11T19:00:01Z","title_canon_sha256":"41ed2c642165a690af1bab9f823ae3930c713e97c849ab2b002c4f2bb935a1ac"},"schema_version":"1.0","source":{"id":"2602.11263","kind":"arxiv","version":1}},"canonical_sha256":"2e951a87f3c374396ba38d6f74659fc63de3968d3420eb3cb679ebbd13ed5ad7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2e951a87f3c374396ba38d6f74659fc63de3968d3420eb3cb679ebbd13ed5ad7","first_computed_at":"2026-07-17T00:20:44.696536Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-17T00:20:44.696536Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DsB2iwFis4FpktIfWwuEMpCuAarWR6TfqEBQeLBhl0nqrJiLJ9LnayyGbyHy22Hp3HkZTVSMMHW1IXm9vgPDAw==","signature_status":"signed_v1","signed_at":"2026-07-17T00:20:44.697462Z","signed_message":"canonical_sha256_bytes"},"source_id":"2602.11263","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a3e13601ad19eb0afbbd4be8988100f0f1fb6676a4007a5b88df393240e0de28","sha256:29b8327e26ee493b243c496edd7d149c86e9080387cfa36239c18f5da3804516"],"state_sha256":"f2d137547b73d7d2eabe594e3362d036178058ccdb27747594b6c49e9f1384b9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T7LnRUDbWImS4JQthmuQicKb5kSa5uUnB2wMjzJNyeu10Z2O1ZvGFz/Xxt5R8Mw8V0gLl4StXCWfALbyNSgtDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T17:02:04.883545Z","bundle_sha256":"e983b18688cfa9871fd6987448e3cc978d1e4906f5a334872a2f27cf51e7fcc8"}}