{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:6E55LZ3EW4APUZ3OBSUQRE277T","short_pith_number":"pith:6E55LZ3E","canonical_record":{"source":{"id":"1703.10779","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2017-03-31T07:48:57Z","cross_cats_sorted":["physics.ins-det"],"title_canon_sha256":"24db36e9bf38ecbf12d561426551762e9d4e8d52d2d000a00c1112be4ef132c4","abstract_canon_sha256":"5fe336509cf64faaa893cd4e510858eaf24db247273d71eb3b45e5e359463776"},"schema_version":"1.0"},"canonical_sha256":"f13bd5e764b700fa676e0ca908935ffce16262d2797167b32c70b4e4ffd7e2ca","source":{"kind":"arxiv","id":"1703.10779","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.10779","created_at":"2026-05-18T00:41:36Z"},{"alias_kind":"arxiv_version","alias_value":"1703.10779v2","created_at":"2026-05-18T00:41:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.10779","created_at":"2026-05-18T00:41:36Z"},{"alias_kind":"pith_short_12","alias_value":"6E55LZ3EW4AP","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"6E55LZ3EW4APUZ3O","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"6E55LZ3E","created_at":"2026-05-18T12:31:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:6E55LZ3EW4APUZ3OBSUQRE277T","target":"record","payload":{"canonical_record":{"source":{"id":"1703.10779","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2017-03-31T07:48:57Z","cross_cats_sorted":["physics.ins-det"],"title_canon_sha256":"24db36e9bf38ecbf12d561426551762e9d4e8d52d2d000a00c1112be4ef132c4","abstract_canon_sha256":"5fe336509cf64faaa893cd4e510858eaf24db247273d71eb3b45e5e359463776"},"schema_version":"1.0"},"canonical_sha256":"f13bd5e764b700fa676e0ca908935ffce16262d2797167b32c70b4e4ffd7e2ca","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:41:36.003186Z","signature_b64":"R7b90z/lJn/jjWS7hBfbD484csyD1QfrOCQEexXjBnKXnXnAOMNOhY8m4dwTkxxRoJOx6HwVvxgA70cuGH2GCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f13bd5e764b700fa676e0ca908935ffce16262d2797167b32c70b4e4ffd7e2ca","last_reissued_at":"2026-05-18T00:41:36.002413Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:41:36.002413Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1703.10779","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":"2026-05-18T00:41:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1deuI48A8AQcyjI09KQnlqlejDrIRFC4hWuC6w5HZxLB8kwXwzlqT5sBaj5fuUE+/06ROpvunrSf2iRRA9eqAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T21:09:49.695518Z"},"content_sha256":"0dac3505ad7af0e0d64488a3d94658f0b2988192fc4e9ec6a6049375819dffc8","schema_version":"1.0","event_id":"sha256:0dac3505ad7af0e0d64488a3d94658f0b2988192fc4e9ec6a6049375819dffc8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:6E55LZ3EW4APUZ3OBSUQRE277T","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First measeurements in search for keV-sterile neutrino in tritium beta-decay by Troitsk nu-mass experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ins-det"],"primary_cat":"hep-ex","authors_text":"A.A. Golubev, A.A. Nozik, A.I. Belesev, A.K. Skasyrskaya, E.V. Geraskin, G.A. Koroteev, I.I. Tkachev, J.N. Abdurashitov, N.A. Likhovid, P.V. Grigorieva, S.V. Zadorozhny, V.G. Chernov, V.I. Parfenov, V.S. Pantuev","submitted_at":"2017-03-31T07:48:57Z","abstract_excerpt":"We present the first measurements of tritium beta-decay spectrum in the electron energy range 16-18.6 keV. The goal is to find distortions which may correspond to the presence of a heavy sterile neutrinos. A possible contribution of this kind would manifest itself as a kink in the spectrum with a similar shape but with end point shifted by the value of a heavy neutrino mass. We set a new upper limits to the neutrino mixing matrix element U^2_{e4} which improve existing limits by a factor from 2 to 5 in the mass range 0.1-2 keV."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.10779","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":""},"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":"2026-05-18T00:41:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RCYCtFXT4PdVJa6qlyMvYI4KbooLWFxEKEbsJRqzlVYTNESxImH7V5jg0H0PUON7CJmShipcEUIFhksft8Y6CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T21:09:49.696093Z"},"content_sha256":"3d4af59328c50c9c63c01758aa681a8bae3bb8c9a5bbef8c71ea6690cba92218","schema_version":"1.0","event_id":"sha256:3d4af59328c50c9c63c01758aa681a8bae3bb8c9a5bbef8c71ea6690cba92218"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6E55LZ3EW4APUZ3OBSUQRE277T/bundle.json","state_url":"https://pith.science/pith/6E55LZ3EW4APUZ3OBSUQRE277T/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6E55LZ3EW4APUZ3OBSUQRE277T/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":"2026-05-31T21:09:49Z","links":{"resolver":"https://pith.science/pith/6E55LZ3EW4APUZ3OBSUQRE277T","bundle":"https://pith.science/pith/6E55LZ3EW4APUZ3OBSUQRE277T/bundle.json","state":"https://pith.science/pith/6E55LZ3EW4APUZ3OBSUQRE277T/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6E55LZ3EW4APUZ3OBSUQRE277T/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:6E55LZ3EW4APUZ3OBSUQRE277T","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":"5fe336509cf64faaa893cd4e510858eaf24db247273d71eb3b45e5e359463776","cross_cats_sorted":["physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2017-03-31T07:48:57Z","title_canon_sha256":"24db36e9bf38ecbf12d561426551762e9d4e8d52d2d000a00c1112be4ef132c4"},"schema_version":"1.0","source":{"id":"1703.10779","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.10779","created_at":"2026-05-18T00:41:36Z"},{"alias_kind":"arxiv_version","alias_value":"1703.10779v2","created_at":"2026-05-18T00:41:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.10779","created_at":"2026-05-18T00:41:36Z"},{"alias_kind":"pith_short_12","alias_value":"6E55LZ3EW4AP","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"6E55LZ3EW4APUZ3O","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"6E55LZ3E","created_at":"2026-05-18T12:31:03Z"}],"graph_snapshots":[{"event_id":"sha256:3d4af59328c50c9c63c01758aa681a8bae3bb8c9a5bbef8c71ea6690cba92218","target":"graph","created_at":"2026-05-18T00:41:36Z","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 present the first measurements of tritium beta-decay spectrum in the electron energy range 16-18.6 keV. The goal is to find distortions which may correspond to the presence of a heavy sterile neutrinos. A possible contribution of this kind would manifest itself as a kink in the spectrum with a similar shape but with end point shifted by the value of a heavy neutrino mass. We set a new upper limits to the neutrino mixing matrix element U^2_{e4} which improve existing limits by a factor from 2 to 5 in the mass range 0.1-2 keV.","authors_text":"A.A. Golubev, A.A. Nozik, A.I. Belesev, A.K. Skasyrskaya, E.V. Geraskin, G.A. Koroteev, I.I. Tkachev, J.N. Abdurashitov, N.A. Likhovid, P.V. Grigorieva, S.V. Zadorozhny, V.G. Chernov, V.I. Parfenov, V.S. Pantuev","cross_cats":["physics.ins-det"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2017-03-31T07:48:57Z","title":"First measeurements in search for keV-sterile neutrino in tritium beta-decay by Troitsk nu-mass experiment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.10779","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":"sha256:0dac3505ad7af0e0d64488a3d94658f0b2988192fc4e9ec6a6049375819dffc8","target":"record","created_at":"2026-05-18T00:41:36Z","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":"5fe336509cf64faaa893cd4e510858eaf24db247273d71eb3b45e5e359463776","cross_cats_sorted":["physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2017-03-31T07:48:57Z","title_canon_sha256":"24db36e9bf38ecbf12d561426551762e9d4e8d52d2d000a00c1112be4ef132c4"},"schema_version":"1.0","source":{"id":"1703.10779","kind":"arxiv","version":2}},"canonical_sha256":"f13bd5e764b700fa676e0ca908935ffce16262d2797167b32c70b4e4ffd7e2ca","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f13bd5e764b700fa676e0ca908935ffce16262d2797167b32c70b4e4ffd7e2ca","first_computed_at":"2026-05-18T00:41:36.002413Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:41:36.002413Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"R7b90z/lJn/jjWS7hBfbD484csyD1QfrOCQEexXjBnKXnXnAOMNOhY8m4dwTkxxRoJOx6HwVvxgA70cuGH2GCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:41:36.003186Z","signed_message":"canonical_sha256_bytes"},"source_id":"1703.10779","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0dac3505ad7af0e0d64488a3d94658f0b2988192fc4e9ec6a6049375819dffc8","sha256:3d4af59328c50c9c63c01758aa681a8bae3bb8c9a5bbef8c71ea6690cba92218"],"state_sha256":"6c503361e72f618179731fae242d72813fb857d0a89d088c667fe8d7e66829b9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bBBf670VmREVGOROOmFKbjNyoRI2BFZCNMFrHThVoWvIvZJPRyu21SZYq4/eKRVsj/qUzGZYC6JzK80HqSxkDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T21:09:49.698978Z","bundle_sha256":"295c75fd971660ac9720f6d92a3dbcbeeb1cac55be846831e17f08d64095b15c"}}