{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:X6EKGJHOPQNPHVVZFNG3XEGAJL","short_pith_number":"pith:X6EKGJHO","canonical_record":{"source":{"id":"1812.00171","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-12-01T08:05:04Z","cross_cats_sorted":[],"title_canon_sha256":"5bf2c0df46986793c98b80e3843fefbc2c579b7804ae618f7a7cfe5e506343ea","abstract_canon_sha256":"a2d380a36eee22e5c8b209a51e2353797f09d3085af153b2d03053b595bc032e"},"schema_version":"1.0"},"canonical_sha256":"bf88a324ee7c1af3d6b92b4dbb90c04af63d5a978058e64517cb186e3f8d741d","source":{"kind":"arxiv","id":"1812.00171","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.00171","created_at":"2026-05-17T23:52:03Z"},{"alias_kind":"arxiv_version","alias_value":"1812.00171v1","created_at":"2026-05-17T23:52:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.00171","created_at":"2026-05-17T23:52:03Z"},{"alias_kind":"pith_short_12","alias_value":"X6EKGJHOPQNP","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"X6EKGJHOPQNPHVVZ","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"X6EKGJHO","created_at":"2026-05-18T12:33:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:X6EKGJHOPQNPHVVZFNG3XEGAJL","target":"record","payload":{"canonical_record":{"source":{"id":"1812.00171","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-12-01T08:05:04Z","cross_cats_sorted":[],"title_canon_sha256":"5bf2c0df46986793c98b80e3843fefbc2c579b7804ae618f7a7cfe5e506343ea","abstract_canon_sha256":"a2d380a36eee22e5c8b209a51e2353797f09d3085af153b2d03053b595bc032e"},"schema_version":"1.0"},"canonical_sha256":"bf88a324ee7c1af3d6b92b4dbb90c04af63d5a978058e64517cb186e3f8d741d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:52:03.872385Z","signature_b64":"2U6DVMle+zHKQuwan2rUmrYoCURW24tA6Fc/IaJrSlEoYxrEGbR1TP789/E+ZEG1RdAd+DAGWGOJxNeW59LwBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bf88a324ee7c1af3d6b92b4dbb90c04af63d5a978058e64517cb186e3f8d741d","last_reissued_at":"2026-05-17T23:52:03.871736Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:52:03.871736Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.00171","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":"2026-05-17T23:52:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cqj2JKoO+PEhh8KXVJHSK/USSpEffxHDW0p4zrOnNf9KddImiaRUHulLUHRkM2ZJY976ioRnpzSMwKaoO/8KAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T02:05:33.374659Z"},"content_sha256":"cbb0c116fb8935bf6f4e34f01d74dc4a38003065a468650421f65982ebd77288","schema_version":"1.0","event_id":"sha256:cbb0c116fb8935bf6f4e34f01d74dc4a38003065a468650421f65982ebd77288"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:X6EKGJHOPQNPHVVZFNG3XEGAJL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Bounds on rare decays of $\\eta$ and $\\eta^\\prime$ mesons from the neutron EDM","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Alexey S. Zhevlakov, Astrid N. Hiller Blin, Mikhail Gorchtein, Thomas Gutsche, Valery E. Lyubovitskij","submitted_at":"2018-12-01T08:05:04Z","abstract_excerpt":"We provide model-independent bounds on the rates of rare decays $\\eta (\\eta^\\prime) \\to \\pi\\pi$ based on experimental limits on the neutron electric dipole moment (nEDM). Starting from phenomenological $\\eta(\\eta^\\prime) \\pi\\pi$ couplings, the nEDM arises at two loop level. The leading-order relativistic ChPT calculation with the minimal photon coupling to charged pions and a proton inside the loops leads to a finite, counter term-free result. This is an improvement upon previous estimates which used approximations in evaluating the two loop contribution and were plagued by divergences. While "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.00171","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":""},"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":"2026-05-17T23:52:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GLWM/nUtlDncAEAI4ERnZeLpIj/oAy9eduN7+Cgjxioom8/DjGfRnWmTZ3P9XHmEp3cXmhYo5eySUVDAdsDoAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T02:05:33.375073Z"},"content_sha256":"47ebbb444aaa2ff36d53c71fde3cdd97860c97a5065463121d715471fa4aa0c2","schema_version":"1.0","event_id":"sha256:47ebbb444aaa2ff36d53c71fde3cdd97860c97a5065463121d715471fa4aa0c2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X6EKGJHOPQNPHVVZFNG3XEGAJL/bundle.json","state_url":"https://pith.science/pith/X6EKGJHOPQNPHVVZFNG3XEGAJL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X6EKGJHOPQNPHVVZFNG3XEGAJL/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":"2026-06-01T02:05:33Z","links":{"resolver":"https://pith.science/pith/X6EKGJHOPQNPHVVZFNG3XEGAJL","bundle":"https://pith.science/pith/X6EKGJHOPQNPHVVZFNG3XEGAJL/bundle.json","state":"https://pith.science/pith/X6EKGJHOPQNPHVVZFNG3XEGAJL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X6EKGJHOPQNPHVVZFNG3XEGAJL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:X6EKGJHOPQNPHVVZFNG3XEGAJL","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":"a2d380a36eee22e5c8b209a51e2353797f09d3085af153b2d03053b595bc032e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-12-01T08:05:04Z","title_canon_sha256":"5bf2c0df46986793c98b80e3843fefbc2c579b7804ae618f7a7cfe5e506343ea"},"schema_version":"1.0","source":{"id":"1812.00171","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.00171","created_at":"2026-05-17T23:52:03Z"},{"alias_kind":"arxiv_version","alias_value":"1812.00171v1","created_at":"2026-05-17T23:52:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.00171","created_at":"2026-05-17T23:52:03Z"},{"alias_kind":"pith_short_12","alias_value":"X6EKGJHOPQNP","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"X6EKGJHOPQNPHVVZ","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"X6EKGJHO","created_at":"2026-05-18T12:33:01Z"}],"graph_snapshots":[{"event_id":"sha256:47ebbb444aaa2ff36d53c71fde3cdd97860c97a5065463121d715471fa4aa0c2","target":"graph","created_at":"2026-05-17T23:52:03Z","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":"We provide model-independent bounds on the rates of rare decays $\\eta (\\eta^\\prime) \\to \\pi\\pi$ based on experimental limits on the neutron electric dipole moment (nEDM). Starting from phenomenological $\\eta(\\eta^\\prime) \\pi\\pi$ couplings, the nEDM arises at two loop level. The leading-order relativistic ChPT calculation with the minimal photon coupling to charged pions and a proton inside the loops leads to a finite, counter term-free result. This is an improvement upon previous estimates which used approximations in evaluating the two loop contribution and were plagued by divergences. While ","authors_text":"Alexey S. Zhevlakov, Astrid N. Hiller Blin, Mikhail Gorchtein, Thomas Gutsche, Valery E. Lyubovitskij","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-12-01T08:05:04Z","title":"Bounds on rare decays of $\\eta$ and $\\eta^\\prime$ mesons from the neutron EDM"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.00171","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:cbb0c116fb8935bf6f4e34f01d74dc4a38003065a468650421f65982ebd77288","target":"record","created_at":"2026-05-17T23:52:03Z","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":"a2d380a36eee22e5c8b209a51e2353797f09d3085af153b2d03053b595bc032e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-12-01T08:05:04Z","title_canon_sha256":"5bf2c0df46986793c98b80e3843fefbc2c579b7804ae618f7a7cfe5e506343ea"},"schema_version":"1.0","source":{"id":"1812.00171","kind":"arxiv","version":1}},"canonical_sha256":"bf88a324ee7c1af3d6b92b4dbb90c04af63d5a978058e64517cb186e3f8d741d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bf88a324ee7c1af3d6b92b4dbb90c04af63d5a978058e64517cb186e3f8d741d","first_computed_at":"2026-05-17T23:52:03.871736Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:52:03.871736Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2U6DVMle+zHKQuwan2rUmrYoCURW24tA6Fc/IaJrSlEoYxrEGbR1TP789/E+ZEG1RdAd+DAGWGOJxNeW59LwBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:52:03.872385Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.00171","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cbb0c116fb8935bf6f4e34f01d74dc4a38003065a468650421f65982ebd77288","sha256:47ebbb444aaa2ff36d53c71fde3cdd97860c97a5065463121d715471fa4aa0c2"],"state_sha256":"cd01c539525afed95722f873b3d63ee273f5dd4460f19044586e626748939e67"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"crtMCvTNXFoNhh49koU3lCZm5HmoFwFzDIm96hpdLEySSLe4gmEHAT3eNiDUl9958a7tJDX1lxnoxEpq/IrNDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T02:05:33.378638Z","bundle_sha256":"4fe403d56e7db2089e177c327f1f66409599a8ffb64dc6405606dc026f164678"}}