{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:JP35GMYOCR5HAI2NFU2XOUQEDQ","short_pith_number":"pith:JP35GMYO","canonical_record":{"source":{"id":"2501.18120","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2025-01-30T03:44:00Z","cross_cats_sorted":[],"title_canon_sha256":"8b5603e2d291cb6697c8baa79d57a3291725937d7ba187d335909284c04770a0","abstract_canon_sha256":"180d814e7e5781016be3adac7249c7a5e25c36eeb54533c6b97964a9b412d94c"},"schema_version":"1.0"},"canonical_sha256":"4bf7d3330e147a70234d2d357752041c07f6b5cda88a85f85650e4843ddeb72e","source":{"kind":"arxiv","id":"2501.18120","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.18120","created_at":"2026-07-05T10:07:07Z"},{"alias_kind":"arxiv_version","alias_value":"2501.18120v1","created_at":"2026-07-05T10:07:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.18120","created_at":"2026-07-05T10:07:07Z"},{"alias_kind":"pith_short_12","alias_value":"JP35GMYOCR5H","created_at":"2026-07-05T10:07:07Z"},{"alias_kind":"pith_short_16","alias_value":"JP35GMYOCR5HAI2N","created_at":"2026-07-05T10:07:07Z"},{"alias_kind":"pith_short_8","alias_value":"JP35GMYO","created_at":"2026-07-05T10:07:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:JP35GMYOCR5HAI2NFU2XOUQEDQ","target":"record","payload":{"canonical_record":{"source":{"id":"2501.18120","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2025-01-30T03:44:00Z","cross_cats_sorted":[],"title_canon_sha256":"8b5603e2d291cb6697c8baa79d57a3291725937d7ba187d335909284c04770a0","abstract_canon_sha256":"180d814e7e5781016be3adac7249c7a5e25c36eeb54533c6b97964a9b412d94c"},"schema_version":"1.0"},"canonical_sha256":"4bf7d3330e147a70234d2d357752041c07f6b5cda88a85f85650e4843ddeb72e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:07:07.352957Z","signature_b64":"+el5D2NAB31so45XOWlfv2oOS9JALsrWKdcGf+5/hrlZl9APQG5VJaUREqaXsQAn0ovYBkeTwBq6GCzWz4HmCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4bf7d3330e147a70234d2d357752041c07f6b5cda88a85f85650e4843ddeb72e","last_reissued_at":"2026-07-05T10:07:07.352485Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:07:07.352485Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2501.18120","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:07:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3URdCP7/qX9ujI2uOcY9FI/XYs1s1gfArGOPYnRpkbqAbo+JCOGIlDAFCKcNhoSCa1nf26+1lFbCEOGc4CcJAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T12:52:42.254501Z"},"content_sha256":"18c041e9131001c7a5a468607b04d84f25023346cd37b9b3842f5673eb0b481e","schema_version":"1.0","event_id":"sha256:18c041e9131001c7a5a468607b04d84f25023346cd37b9b3842f5673eb0b481e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:JP35GMYOCR5HAI2NFU2XOUQEDQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spin-dependent dark matter scattering in quasi-two-dimensional magnets","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Giacomo Marocco, John Wheater","submitted_at":"2025-01-30T03:44:00Z","abstract_excerpt":"We study the prospects of detecting dark matter coupled to the spin of the electron, such that it may scatter and excite magnons - collective excitations of electronic spins. We show that materials exhibiting long-range magnetic order where the spins are coupled only along a plane may act as directional dark matter detectors. These quasi-2D materials possess anisotropic dispersion relations and structure functions which induce a sidereal modulation in the excitation rate. We calculate the expected signal rate for some candidate (anti)ferromagnets, demonstrating a possible route to the direct d"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.18120","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2501.18120/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:07:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bfJTN6wcgjQ66wnd848sVuGkJNNuRbqTlTOryF1RriO0Hi2UGZEMjQKlZer5gn6AHuwBFBI3xZ1cIe+W9Uc0BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T12:52:42.254845Z"},"content_sha256":"e4e45805bedf799da864e30025423f955f39d2595a0bccc54cedf13f29c688cf","schema_version":"1.0","event_id":"sha256:e4e45805bedf799da864e30025423f955f39d2595a0bccc54cedf13f29c688cf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JP35GMYOCR5HAI2NFU2XOUQEDQ/bundle.json","state_url":"https://pith.science/pith/JP35GMYOCR5HAI2NFU2XOUQEDQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JP35GMYOCR5HAI2NFU2XOUQEDQ/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":"2026-08-18T12:52:42Z","links":{"resolver":"https://pith.science/pith/JP35GMYOCR5HAI2NFU2XOUQEDQ","bundle":"https://pith.science/pith/JP35GMYOCR5HAI2NFU2XOUQEDQ/bundle.json","state":"https://pith.science/pith/JP35GMYOCR5HAI2NFU2XOUQEDQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JP35GMYOCR5HAI2NFU2XOUQEDQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:JP35GMYOCR5HAI2NFU2XOUQEDQ","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":"180d814e7e5781016be3adac7249c7a5e25c36eeb54533c6b97964a9b412d94c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2025-01-30T03:44:00Z","title_canon_sha256":"8b5603e2d291cb6697c8baa79d57a3291725937d7ba187d335909284c04770a0"},"schema_version":"1.0","source":{"id":"2501.18120","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.18120","created_at":"2026-07-05T10:07:07Z"},{"alias_kind":"arxiv_version","alias_value":"2501.18120v1","created_at":"2026-07-05T10:07:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.18120","created_at":"2026-07-05T10:07:07Z"},{"alias_kind":"pith_short_12","alias_value":"JP35GMYOCR5H","created_at":"2026-07-05T10:07:07Z"},{"alias_kind":"pith_short_16","alias_value":"JP35GMYOCR5HAI2N","created_at":"2026-07-05T10:07:07Z"},{"alias_kind":"pith_short_8","alias_value":"JP35GMYO","created_at":"2026-07-05T10:07:07Z"}],"graph_snapshots":[{"event_id":"sha256:e4e45805bedf799da864e30025423f955f39d2595a0bccc54cedf13f29c688cf","target":"graph","created_at":"2026-07-05T10:07:07Z","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/2501.18120/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study the prospects of detecting dark matter coupled to the spin of the electron, such that it may scatter and excite magnons - collective excitations of electronic spins. We show that materials exhibiting long-range magnetic order where the spins are coupled only along a plane may act as directional dark matter detectors. These quasi-2D materials possess anisotropic dispersion relations and structure functions which induce a sidereal modulation in the excitation rate. We calculate the expected signal rate for some candidate (anti)ferromagnets, demonstrating a possible route to the direct d","authors_text":"Giacomo Marocco, John Wheater","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2025-01-30T03:44:00Z","title":"Spin-dependent dark matter scattering in quasi-two-dimensional magnets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.18120","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":"sha256:18c041e9131001c7a5a468607b04d84f25023346cd37b9b3842f5673eb0b481e","target":"record","created_at":"2026-07-05T10:07:07Z","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":"180d814e7e5781016be3adac7249c7a5e25c36eeb54533c6b97964a9b412d94c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2025-01-30T03:44:00Z","title_canon_sha256":"8b5603e2d291cb6697c8baa79d57a3291725937d7ba187d335909284c04770a0"},"schema_version":"1.0","source":{"id":"2501.18120","kind":"arxiv","version":1}},"canonical_sha256":"4bf7d3330e147a70234d2d357752041c07f6b5cda88a85f85650e4843ddeb72e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4bf7d3330e147a70234d2d357752041c07f6b5cda88a85f85650e4843ddeb72e","first_computed_at":"2026-07-05T10:07:07.352485Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:07:07.352485Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+el5D2NAB31so45XOWlfv2oOS9JALsrWKdcGf+5/hrlZl9APQG5VJaUREqaXsQAn0ovYBkeTwBq6GCzWz4HmCw==","signature_status":"signed_v1","signed_at":"2026-07-05T10:07:07.352957Z","signed_message":"canonical_sha256_bytes"},"source_id":"2501.18120","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:18c041e9131001c7a5a468607b04d84f25023346cd37b9b3842f5673eb0b481e","sha256:e4e45805bedf799da864e30025423f955f39d2595a0bccc54cedf13f29c688cf"],"state_sha256":"ecb381722606957fbe3b8e65b85f399ae6e7b47381efc2553c55bca822392d40"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V2ybu03TdtWfPd88AfMK5mo//Ghbjad3NeYnR3gyGn6IPsdcZRmDFvQwRg2hLKLr0n7jlSo2unDeJQV9aiPGBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T12:52:42.258447Z","bundle_sha256":"6c1073997834ccacceab0d109adc21edc342df2d7c60bd6cfbd4b267fea3bb4c"}}