{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:ASXP4KM44AKTYHFU6RSHF7ZUFY","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":"bfba328eb49133030d6e3025b0dd27fc83074fa91d47257d4da09c7a931612e9","cross_cats_sorted":["astro-ph.CO","hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2020-05-04T16:36:17Z","title_canon_sha256":"39ffd05a0bd41f43a4f7c572857c84732cd9b78a9ae1cc50a3b34f2eeb5a8fac"},"schema_version":"1.0","source":{"id":"2005.01629","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2005.01629","created_at":"2026-07-05T01:14:49Z"},{"alias_kind":"arxiv_version","alias_value":"2005.01629v1","created_at":"2026-07-05T01:14:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2005.01629","created_at":"2026-07-05T01:14:49Z"},{"alias_kind":"pith_short_12","alias_value":"ASXP4KM44AKT","created_at":"2026-07-05T01:14:49Z"},{"alias_kind":"pith_short_16","alias_value":"ASXP4KM44AKTYHFU","created_at":"2026-07-05T01:14:49Z"},{"alias_kind":"pith_short_8","alias_value":"ASXP4KM4","created_at":"2026-07-05T01:14:49Z"}],"graph_snapshots":[{"event_id":"sha256:e75cf9db623e63bba383169b074ff469ba750813252ed5e412f195a8db2c94eb","target":"graph","created_at":"2026-07-05T01:14:49Z","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/2005.01629/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"If neutrinos are Dirac particles the existence of light right-handed neutrinos $\\nu_{R}$ is implied. Those would contribute to the effective number of relativistic neutrino species $N_{{\\rm eff}}$ in the early Universe. With pure standard model interactions, the contribution is negligibly small. In the presence of new interactions, however, the contribution could be significantly enhanced. We consider the most general effective four-fermion interactions for neutrinos (scalar, pseudo-scalar, vector, axial-vector and tensor), and compute the contribution of right-handed neutrinos to $N_{{\\rm eff","authors_text":"Werner Rodejohann, Xuheng Luo, Xun-Jie Xu","cross_cats":["astro-ph.CO","hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2020-05-04T16:36:17Z","title":"Dirac neutrinos and $N_{{\\rm eff}}$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.01629","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":"sha256:3400cbd6026d746f169831b90b4234e9c2806f3f29fcddc8f7384999bab745f7","target":"record","created_at":"2026-07-05T01:14:49Z","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":"bfba328eb49133030d6e3025b0dd27fc83074fa91d47257d4da09c7a931612e9","cross_cats_sorted":["astro-ph.CO","hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2020-05-04T16:36:17Z","title_canon_sha256":"39ffd05a0bd41f43a4f7c572857c84732cd9b78a9ae1cc50a3b34f2eeb5a8fac"},"schema_version":"1.0","source":{"id":"2005.01629","kind":"arxiv","version":1}},"canonical_sha256":"04aefe299ce0153c1cb4f46472ff342e17815ec76e04701d61af6967cb761909","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"04aefe299ce0153c1cb4f46472ff342e17815ec76e04701d61af6967cb761909","first_computed_at":"2026-07-05T01:14:49.531507Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:14:49.531507Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uSffaweCYMEkAgsnqnZSK3G7/aAtz9XMlc7ie8EXxPlRL0tgJzqhVEtjOacisha5YWXm5A81qAt0hp35LHahCw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:14:49.532019Z","signed_message":"canonical_sha256_bytes"},"source_id":"2005.01629","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3400cbd6026d746f169831b90b4234e9c2806f3f29fcddc8f7384999bab745f7","sha256:e75cf9db623e63bba383169b074ff469ba750813252ed5e412f195a8db2c94eb"],"state_sha256":"b4a736190fc43e34f26cdaa1273a606d9fbf6d25b4e06b254ddc3602e806ff46"}