{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:5C6GWS5CO2OEUPEUQLEGLFXMZ2","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":"06efae09f49e076a0128d94fbc98db988d961d53fb3d4edd1cea55aec7c8d1f8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-12-21T06:15:23Z","title_canon_sha256":"d389920ba2526ee99dc2ee42e749fa3e5efdb9dda48e7f4e5473d23176c88ae1"},"schema_version":"1.0","source":{"id":"1612.06985","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.06985","created_at":"2026-05-18T00:50:46Z"},{"alias_kind":"arxiv_version","alias_value":"1612.06985v1","created_at":"2026-05-18T00:50:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.06985","created_at":"2026-05-18T00:50:46Z"},{"alias_kind":"pith_short_12","alias_value":"5C6GWS5CO2OE","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"5C6GWS5CO2OEUPEU","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"5C6GWS5C","created_at":"2026-05-18T12:30:01Z"}],"graph_snapshots":[{"event_id":"sha256:3df2ed6f2324e54fc9c0dcc9f58cd3a3ce723b61de03107dc0809a96996217ba","target":"graph","created_at":"2026-05-18T00:50:46Z","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":"Rare leptonic kaon and pion decays $K^+(\\pi^+) \\to \\mu^+\\, \\nu_{\\mu}\\, e^+ e^-$ can be used to probe a dark photon of mass ${\\cal O}(10)$~MeV, with the background coming from the mediation of a virtual photon. This is most relevant for the 16.7-MeV dark photon proposed to explain a 6.8$\\sigma$ anomaly recently observed in $^8$Be transitions by the Atomki Collaboration. We evaluate the reach of future experiments for different scenarios of how the dark photon couples with the standard model particles, and show that a great portion of the preferred 16.7-MeV dark photon parameter space can be dec","authors_text":"Cheng-Wei Chiang, Po-Yan Tseng","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-12-21T06:15:23Z","title":"Probing a dark photon using rare leptonic kaon and pion decays"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.06985","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":"sha256:0f48324802a70c28be82543ba50ad8c6163cd1dcd9ab1167c46a87775b807c78","target":"record","created_at":"2026-05-18T00:50:46Z","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":"06efae09f49e076a0128d94fbc98db988d961d53fb3d4edd1cea55aec7c8d1f8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-12-21T06:15:23Z","title_canon_sha256":"d389920ba2526ee99dc2ee42e749fa3e5efdb9dda48e7f4e5473d23176c88ae1"},"schema_version":"1.0","source":{"id":"1612.06985","kind":"arxiv","version":1}},"canonical_sha256":"e8bc6b4ba2769c4a3c9482c86596ecceb68529cd088390181c310c01b405223d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e8bc6b4ba2769c4a3c9482c86596ecceb68529cd088390181c310c01b405223d","first_computed_at":"2026-05-18T00:50:46.123001Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:50:46.123001Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gQoulM2k/lzMUz4Kc+G2BSOv2zcR7NLFKk9OqqvxJw2ymxnNC5ILDx+MkCwUFnNvEvC7U9w/DRSmAolSPBn7Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:50:46.123719Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.06985","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0f48324802a70c28be82543ba50ad8c6163cd1dcd9ab1167c46a87775b807c78","sha256:3df2ed6f2324e54fc9c0dcc9f58cd3a3ce723b61de03107dc0809a96996217ba"],"state_sha256":"9026b7b44b0d2008c6d47d5146620f6b3003b42224d82be12291c12827ca5d36"}