{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:36PJG22RT2P52G5F7VIVTEO72S","short_pith_number":"pith:36PJG22R","schema_version":"1.0","canonical_sha256":"df9e936b519e9fdd1ba5fd515991dfd4bf4c005981287ca6f2f52cbacd587b03","source":{"kind":"arxiv","id":"1707.09630","version":1},"attestation_state":"computed","paper":{"title":"Constraining Spacetime Nonmetricity with Neutron Spin Rotation in Liquid He-4","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Ralf Lehnert, Rui Xu, W.M. Snow, Zhi Xiao","submitted_at":"2017-07-30T15:18:38Z","abstract_excerpt":"General spacetime nonmetricity coupled to neutrons is studied. In this context, it is shown that certain nonmetricity components can generate a rotation of the neutron's spin. Available data on this effect obtained from slow-neutron propagation in liquid helium are used to constrain isotropic nonmetricity components at the level of $10^{-22}\\,$GeV. These results represent the first limit on the nonmetricity $\\zeta^{(6)}_2S_{000}$ parameter as well as the first measurement of nonmetricity inside matter."},"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":"1707.09630","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2017-07-30T15:18:38Z","cross_cats_sorted":[],"title_canon_sha256":"2f0215099c6ba942baa61f5221ef61f154f6ff937b47c5f07eb23d426d1f7ce3","abstract_canon_sha256":"7eedb937b02cfed1f43a6f670672832e9c4c78f003668eb1c87183d52bbb3c2a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:35:19.350310Z","signature_b64":"zijnnuVisqEyfyzdBzai+0kQnVr+9pncC8aM9Ga4n1UcUXLLJf9ADwmd/F+rV3wRtMNI/CAgaejl4QBJlxPSDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"df9e936b519e9fdd1ba5fd515991dfd4bf4c005981287ca6f2f52cbacd587b03","last_reissued_at":"2026-05-18T00:35:19.349759Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:35:19.349759Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Constraining Spacetime Nonmetricity with Neutron Spin Rotation in Liquid He-4","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Ralf Lehnert, Rui Xu, W.M. Snow, Zhi Xiao","submitted_at":"2017-07-30T15:18:38Z","abstract_excerpt":"General spacetime nonmetricity coupled to neutrons is studied. In this context, it is shown that certain nonmetricity components can generate a rotation of the neutron's spin. Available data on this effect obtained from slow-neutron propagation in liquid helium are used to constrain isotropic nonmetricity components at the level of $10^{-22}\\,$GeV. These results represent the first limit on the nonmetricity $\\zeta^{(6)}_2S_{000}$ parameter as well as the first measurement of nonmetricity inside matter."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.09630","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1707.09630","created_at":"2026-05-18T00:35:19.349821+00:00"},{"alias_kind":"arxiv_version","alias_value":"1707.09630v1","created_at":"2026-05-18T00:35:19.349821+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.09630","created_at":"2026-05-18T00:35:19.349821+00:00"},{"alias_kind":"pith_short_12","alias_value":"36PJG22RT2P5","created_at":"2026-05-18T12:30:58.224056+00:00"},{"alias_kind":"pith_short_16","alias_value":"36PJG22RT2P52G5F","created_at":"2026-05-18T12:30:58.224056+00:00"},{"alias_kind":"pith_short_8","alias_value":"36PJG22R","created_at":"2026-05-18T12:30:58.224056+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/36PJG22RT2P52G5F7VIVTEO72S","json":"https://pith.science/pith/36PJG22RT2P52G5F7VIVTEO72S.json","graph_json":"https://pith.science/api/pith-number/36PJG22RT2P52G5F7VIVTEO72S/graph.json","events_json":"https://pith.science/api/pith-number/36PJG22RT2P52G5F7VIVTEO72S/events.json","paper":"https://pith.science/paper/36PJG22R"},"agent_actions":{"view_html":"https://pith.science/pith/36PJG22RT2P52G5F7VIVTEO72S","download_json":"https://pith.science/pith/36PJG22RT2P52G5F7VIVTEO72S.json","view_paper":"https://pith.science/paper/36PJG22R","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1707.09630&json=true","fetch_graph":"https://pith.science/api/pith-number/36PJG22RT2P52G5F7VIVTEO72S/graph.json","fetch_events":"https://pith.science/api/pith-number/36PJG22RT2P52G5F7VIVTEO72S/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/36PJG22RT2P52G5F7VIVTEO72S/action/timestamp_anchor","attest_storage":"https://pith.science/pith/36PJG22RT2P52G5F7VIVTEO72S/action/storage_attestation","attest_author":"https://pith.science/pith/36PJG22RT2P52G5F7VIVTEO72S/action/author_attestation","sign_citation":"https://pith.science/pith/36PJG22RT2P52G5F7VIVTEO72S/action/citation_signature","submit_replication":"https://pith.science/pith/36PJG22RT2P52G5F7VIVTEO72S/action/replication_record"}},"created_at":"2026-05-18T00:35:19.349821+00:00","updated_at":"2026-05-18T00:35:19.349821+00:00"}