{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:FG6R5EU543QRWFHFVXPZQGHR5N","short_pith_number":"pith:FG6R5EU5","schema_version":"1.0","canonical_sha256":"29bd1e929de6e11b14e5addf9818f1eb526ebc0953d16315c7ad322bd3bcf03e","source":{"kind":"arxiv","id":"0905.3221","version":2},"attestation_state":"computed","paper":{"title":"Test of Lorentz invariance with spin precession of ultracold neutrons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Knecht, A. Kozela, A. Mtchedlishvili, A. Pazgalev, A. Weis, B. Lauss, C. A. Baker, D. Rebreyend, D. Shiers, E. Gutsmiedl, E. Pierre, F. Kuchler, G. Ban, G. Bison, G. Petzoldt, G. Pignol, G. Qu\\'em\\'ener, G. Rogel, G. Zsigmond, I. Altarev, J. M. Pendlebury, J. Zejma, K. Bodek, K. Green, K. Kirch, M. Daum, M. G. D. van der Grinten, M. Horras, M. Ku\\'zniak, M. Rebetez, N. Khomutov, N. Severijns, O. Naviliat-Cuncic, P. Fierlinger, P. Geltenbort, P. G. Harris, P. Iaydjiev, P. Knowles, R. Henneck, S. Kistryn, S. N. Ivanov, S. Roccia, T. Lauer, T. Lefort, W. Heil, Yu. Sobolev","submitted_at":"2009-05-20T05:51:05Z","abstract_excerpt":"A clock comparison experiment, analyzing the ratio of spin precession frequencies of stored ultracold neutrons and $^{199}$Hg atoms is reported. %57 No daily variation of this ratio could be found, from which is set an upper limit on the Lorentz invariance violating cosmic anisotropy field $b_{\\bot} < 2 \\times 10^{-20} {\\rm eV}$ (95% C.L.). This is the first limit for the free neutron. This result is also interpreted as a direct limit on the gravitational dipole moment of the neutron $|g_n| < 0.3 $eV/$c^2$ m from a spin-dependent interaction with the Sun. Analyzing the gravitational interactio"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0905.3221","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2009-05-20T05:51:05Z","cross_cats_sorted":[],"title_canon_sha256":"1e935e76916777f404af887ef6f8d2d76391c2a77ad9c1a85a4ac985356861de","abstract_canon_sha256":"0e107fa3def07ef1e0731cb11fae27a37db4d77f01ce048c7c4af2251b84e0f2"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:48:47.566943Z","signature_b64":"gwXJ2ogaMyHqvD61fwmpTwqGcEg/6MBfHuwdiSKK2Xdme9KaPHlhvo5Pkr2NRiZ+VeI9yMjUzURZ2tuxWScvDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"29bd1e929de6e11b14e5addf9818f1eb526ebc0953d16315c7ad322bd3bcf03e","last_reissued_at":"2026-07-04T15:48:47.566514Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:48:47.566514Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Test of Lorentz invariance with spin precession of ultracold neutrons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Knecht, A. Kozela, A. Mtchedlishvili, A. Pazgalev, A. Weis, B. Lauss, C. A. Baker, D. Rebreyend, D. Shiers, E. Gutsmiedl, E. Pierre, F. Kuchler, G. Ban, G. Bison, G. Petzoldt, G. Pignol, G. Qu\\'em\\'ener, G. Rogel, G. Zsigmond, I. Altarev, J. M. Pendlebury, J. Zejma, K. Bodek, K. Green, K. Kirch, M. Daum, M. G. D. van der Grinten, M. Horras, M. Ku\\'zniak, M. Rebetez, N. Khomutov, N. Severijns, O. Naviliat-Cuncic, P. Fierlinger, P. Geltenbort, P. G. Harris, P. Iaydjiev, P. Knowles, R. Henneck, S. Kistryn, S. N. Ivanov, S. Roccia, T. Lauer, T. Lefort, W. Heil, Yu. Sobolev","submitted_at":"2009-05-20T05:51:05Z","abstract_excerpt":"A clock comparison experiment, analyzing the ratio of spin precession frequencies of stored ultracold neutrons and $^{199}$Hg atoms is reported. %57 No daily variation of this ratio could be found, from which is set an upper limit on the Lorentz invariance violating cosmic anisotropy field $b_{\\bot} < 2 \\times 10^{-20} {\\rm eV}$ (95% C.L.). This is the first limit for the free neutron. This result is also interpreted as a direct limit on the gravitational dipole moment of the neutron $|g_n| < 0.3 $eV/$c^2$ m from a spin-dependent interaction with the Sun. Analyzing the gravitational interactio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.3221","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0905.3221/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0905.3221","created_at":"2026-07-04T15:48:47.566575+00:00"},{"alias_kind":"arxiv_version","alias_value":"0905.3221v2","created_at":"2026-07-04T15:48:47.566575+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.3221","created_at":"2026-07-04T15:48:47.566575+00:00"},{"alias_kind":"pith_short_12","alias_value":"FG6R5EU543QR","created_at":"2026-07-04T15:48:47.566575+00:00"},{"alias_kind":"pith_short_16","alias_value":"FG6R5EU543QRWFHF","created_at":"2026-07-04T15:48:47.566575+00:00"},{"alias_kind":"pith_short_8","alias_value":"FG6R5EU5","created_at":"2026-07-04T15:48:47.566575+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2509.02791","citing_title":"Towards Precise Simulations and Inference for the Neutron EDM","ref_index":13,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/FG6R5EU543QRWFHFVXPZQGHR5N","json":"https://pith.science/pith/FG6R5EU543QRWFHFVXPZQGHR5N.json","graph_json":"https://pith.science/api/pith-number/FG6R5EU543QRWFHFVXPZQGHR5N/graph.json","events_json":"https://pith.science/api/pith-number/FG6R5EU543QRWFHFVXPZQGHR5N/events.json","paper":"https://pith.science/paper/FG6R5EU5"},"agent_actions":{"view_html":"https://pith.science/pith/FG6R5EU543QRWFHFVXPZQGHR5N","download_json":"https://pith.science/pith/FG6R5EU543QRWFHFVXPZQGHR5N.json","view_paper":"https://pith.science/paper/FG6R5EU5","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0905.3221&json=true","fetch_graph":"https://pith.science/api/pith-number/FG6R5EU543QRWFHFVXPZQGHR5N/graph.json","fetch_events":"https://pith.science/api/pith-number/FG6R5EU543QRWFHFVXPZQGHR5N/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FG6R5EU543QRWFHFVXPZQGHR5N/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FG6R5EU543QRWFHFVXPZQGHR5N/action/storage_attestation","attest_author":"https://pith.science/pith/FG6R5EU543QRWFHFVXPZQGHR5N/action/author_attestation","sign_citation":"https://pith.science/pith/FG6R5EU543QRWFHFVXPZQGHR5N/action/citation_signature","submit_replication":"https://pith.science/pith/FG6R5EU543QRWFHFVXPZQGHR5N/action/replication_record"}},"created_at":"2026-07-04T15:48:47.566575+00:00","updated_at":"2026-07-04T15:48:47.566575+00:00"}