{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:5VXWNLVWF2V5C6QZLLALHW2KGB","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":"3e60aece08fb791b25f9137a9631980e4d8d4f39c326f3fa55f654b8a6407b88","cross_cats_sorted":["cond-mat.mtrl-sci","hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-07-26T18:00:03Z","title_canon_sha256":"075aedebf878629cbd2fb2a38a8a82ed33ad4ac8c23497c848d96232d21103d5"},"schema_version":"1.0","source":{"id":"1807.10291","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.10291","created_at":"2026-05-17T23:57:10Z"},{"alias_kind":"arxiv_version","alias_value":"1807.10291v1","created_at":"2026-05-17T23:57:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.10291","created_at":"2026-05-17T23:57:10Z"},{"alias_kind":"pith_short_12","alias_value":"5VXWNLVWF2V5","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"5VXWNLVWF2V5C6QZ","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"5VXWNLVW","created_at":"2026-05-18T12:32:08Z"}],"graph_snapshots":[{"event_id":"sha256:d701f5b5b41b40cc1cb6c184a0f5cbe14ed525360ffd9d45425afe89493fdc9c","target":"graph","created_at":"2026-05-17T23:57:10Z","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 consider the direct detection of dark matter (DM) with polar materials, where single production of optical or acoustic phonons gives excellent reach to scattering of sub-MeV DM for both scalar and vector mediators. Using Density Functional Theory (DFT), we calculate the material-specific matrix elements, focusing on GaAs and sapphire, and show that DM scattering in an anisotropic crystal such as sapphire features a strong directional dependence. For example, for a DM candidate with mass 40 keV and relic abundance set by freeze-in, the daily modulation in the interaction rate can be establis","authors_text":"Kathryn M. Zurek, Simon Knapen, Sinead Griffin, Tongyan Lin","cross_cats":["cond-mat.mtrl-sci","hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-07-26T18:00:03Z","title":"Directional Detection of Light Dark Matter with Polar Materials"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.10291","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:be1eb59c63ceefe1415e6786ba9b3d492eb4090ca68d2c316b298000bf2b1df1","target":"record","created_at":"2026-05-17T23:57:10Z","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":"3e60aece08fb791b25f9137a9631980e4d8d4f39c326f3fa55f654b8a6407b88","cross_cats_sorted":["cond-mat.mtrl-sci","hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-07-26T18:00:03Z","title_canon_sha256":"075aedebf878629cbd2fb2a38a8a82ed33ad4ac8c23497c848d96232d21103d5"},"schema_version":"1.0","source":{"id":"1807.10291","kind":"arxiv","version":1}},"canonical_sha256":"ed6f66aeb62eabd17a195ac0b3db4a30464d9741a263e310d83ea42b0a89447e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ed6f66aeb62eabd17a195ac0b3db4a30464d9741a263e310d83ea42b0a89447e","first_computed_at":"2026-05-17T23:57:10.188847Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:57:10.188847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HQ0q/NNZIFIlJ0S78aYg8CG/wKRFFFqTZGdfpSy4rdXIHuGVXzVOZF5bad0Kmp19oOBLRU8YI0tC1KFHhV0RBw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:57:10.189335Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.10291","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:be1eb59c63ceefe1415e6786ba9b3d492eb4090ca68d2c316b298000bf2b1df1","sha256:d701f5b5b41b40cc1cb6c184a0f5cbe14ed525360ffd9d45425afe89493fdc9c"],"state_sha256":"91f3b27d0a0289a6318ab48500e096e518983d47a172d649a4b628a4d43a40c4"}