{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:J2FQ7DXFTIPUT42UWHRO446WAZ","short_pith_number":"pith:J2FQ7DXF","canonical_record":{"source":{"id":"1812.07577","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-12-18T19:00:01Z","cross_cats_sorted":["gr-qc","hep-ph"],"title_canon_sha256":"57cb3a75a472de1f327a0c02214127c7c22f55d99f41ff7e59af4d46bf025f82","abstract_canon_sha256":"1ce15d668007031e45e812ab3a70374913108686ea57f86dc92e46b979fa9a66"},"schema_version":"1.0"},"canonical_sha256":"4e8b0f8ee59a1f49f354b1e2ee73d60658a86dc5adaf175ba0a11c17e9aef8ec","source":{"kind":"arxiv","id":"1812.07577","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.07577","created_at":"2026-07-04T23:55:36Z"},{"alias_kind":"arxiv_version","alias_value":"1812.07577v2","created_at":"2026-07-04T23:55:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.07577","created_at":"2026-07-04T23:55:36Z"},{"alias_kind":"pith_short_12","alias_value":"J2FQ7DXFTIPU","created_at":"2026-07-04T23:55:36Z"},{"alias_kind":"pith_short_16","alias_value":"J2FQ7DXFTIPUT42U","created_at":"2026-07-04T23:55:36Z"},{"alias_kind":"pith_short_8","alias_value":"J2FQ7DXF","created_at":"2026-07-04T23:55:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:J2FQ7DXFTIPUT42UWHRO446WAZ","target":"record","payload":{"canonical_record":{"source":{"id":"1812.07577","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-12-18T19:00:01Z","cross_cats_sorted":["gr-qc","hep-ph"],"title_canon_sha256":"57cb3a75a472de1f327a0c02214127c7c22f55d99f41ff7e59af4d46bf025f82","abstract_canon_sha256":"1ce15d668007031e45e812ab3a70374913108686ea57f86dc92e46b979fa9a66"},"schema_version":"1.0"},"canonical_sha256":"4e8b0f8ee59a1f49f354b1e2ee73d60658a86dc5adaf175ba0a11c17e9aef8ec","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:55:36.177298Z","signature_b64":"G7tVCFwbfpdQ0QG1wAfbA+IIGq4sj4U+7FBK3pKTiaQx4451+nf3e3ijWsR6kcHKUox4GG9lDBhQ5NeuhuHqCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4e8b0f8ee59a1f49f354b1e2ee73d60658a86dc5adaf175ba0a11c17e9aef8ec","last_reissued_at":"2026-07-04T23:55:36.176734Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:55:36.176734Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.07577","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":"2026-07-04T23:55:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RgPx84vpgGXVKbOKc6uVkrUDlaPNHnOy/szjzyV1AeODlq4KJw9U4RDSur3kTurHivDvXqmvqjqDljIdKEiMCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T05:24:13.602094Z"},"content_sha256":"367c6370e05719385b39266ccea6c097b4717826dd923858ee133b0b2687d29b","schema_version":"1.0","event_id":"sha256:367c6370e05719385b39266ccea6c097b4717826dd923858ee133b0b2687d29b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:J2FQ7DXFTIPUT42UWHRO446WAZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Using a Primordial Gravitational Wave Background to Illuminate New Physics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-ph"],"primary_cat":"astro-ph.CO","authors_text":"Devin G. E. Walker, Robert R. Caldwell, Tristan L. Smith","submitted_at":"2018-12-18T19:00:01Z","abstract_excerpt":"A primordial spectrum of gravitational waves serves as a backlight to the relativistic degrees of freedom of the cosmological fluid. Any change in the particle physics content, due to a change of phase or freeze-out of a species, will leave a characteristic imprint on an otherwise featureless primordial spectrum of gravitational waves and indicate its early-Universe provenance. We show that a gravitational wave detector such as the Laser Interferometer Space Antenna would be sensitive to physics near 100 TeV in the presence of a sufficiently strong primordial spectrum. Such a detection could c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.07577","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/1812.07577/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":"2026-07-04T23:55:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YSWgMZnOB4I7tup1CUAscA8tqlXG41+N6wn5oBRTnHieinP6oIGA0Jp4LviK93KD22XhoVMac8kLzWefLxaCAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T05:24:13.602757Z"},"content_sha256":"0c47e5e70a334e484dbac9d08483b09d5f1e0ba6babe7244de2a9edf5502b7ef","schema_version":"1.0","event_id":"sha256:0c47e5e70a334e484dbac9d08483b09d5f1e0ba6babe7244de2a9edf5502b7ef"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/J2FQ7DXFTIPUT42UWHRO446WAZ/bundle.json","state_url":"https://pith.science/pith/J2FQ7DXFTIPUT42UWHRO446WAZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/J2FQ7DXFTIPUT42UWHRO446WAZ/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":"2026-07-07T05:24:13Z","links":{"resolver":"https://pith.science/pith/J2FQ7DXFTIPUT42UWHRO446WAZ","bundle":"https://pith.science/pith/J2FQ7DXFTIPUT42UWHRO446WAZ/bundle.json","state":"https://pith.science/pith/J2FQ7DXFTIPUT42UWHRO446WAZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/J2FQ7DXFTIPUT42UWHRO446WAZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:J2FQ7DXFTIPUT42UWHRO446WAZ","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":"1ce15d668007031e45e812ab3a70374913108686ea57f86dc92e46b979fa9a66","cross_cats_sorted":["gr-qc","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-12-18T19:00:01Z","title_canon_sha256":"57cb3a75a472de1f327a0c02214127c7c22f55d99f41ff7e59af4d46bf025f82"},"schema_version":"1.0","source":{"id":"1812.07577","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.07577","created_at":"2026-07-04T23:55:36Z"},{"alias_kind":"arxiv_version","alias_value":"1812.07577v2","created_at":"2026-07-04T23:55:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.07577","created_at":"2026-07-04T23:55:36Z"},{"alias_kind":"pith_short_12","alias_value":"J2FQ7DXFTIPU","created_at":"2026-07-04T23:55:36Z"},{"alias_kind":"pith_short_16","alias_value":"J2FQ7DXFTIPUT42U","created_at":"2026-07-04T23:55:36Z"},{"alias_kind":"pith_short_8","alias_value":"J2FQ7DXF","created_at":"2026-07-04T23:55:36Z"}],"graph_snapshots":[{"event_id":"sha256:0c47e5e70a334e484dbac9d08483b09d5f1e0ba6babe7244de2a9edf5502b7ef","target":"graph","created_at":"2026-07-04T23:55:36Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1812.07577/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A primordial spectrum of gravitational waves serves as a backlight to the relativistic degrees of freedom of the cosmological fluid. Any change in the particle physics content, due to a change of phase or freeze-out of a species, will leave a characteristic imprint on an otherwise featureless primordial spectrum of gravitational waves and indicate its early-Universe provenance. We show that a gravitational wave detector such as the Laser Interferometer Space Antenna would be sensitive to physics near 100 TeV in the presence of a sufficiently strong primordial spectrum. Such a detection could c","authors_text":"Devin G. E. Walker, Robert R. Caldwell, Tristan L. Smith","cross_cats":["gr-qc","hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-12-18T19:00:01Z","title":"Using a Primordial Gravitational Wave Background to Illuminate New Physics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.07577","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":"sha256:367c6370e05719385b39266ccea6c097b4717826dd923858ee133b0b2687d29b","target":"record","created_at":"2026-07-04T23:55:36Z","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":"1ce15d668007031e45e812ab3a70374913108686ea57f86dc92e46b979fa9a66","cross_cats_sorted":["gr-qc","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-12-18T19:00:01Z","title_canon_sha256":"57cb3a75a472de1f327a0c02214127c7c22f55d99f41ff7e59af4d46bf025f82"},"schema_version":"1.0","source":{"id":"1812.07577","kind":"arxiv","version":2}},"canonical_sha256":"4e8b0f8ee59a1f49f354b1e2ee73d60658a86dc5adaf175ba0a11c17e9aef8ec","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4e8b0f8ee59a1f49f354b1e2ee73d60658a86dc5adaf175ba0a11c17e9aef8ec","first_computed_at":"2026-07-04T23:55:36.176734Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:55:36.176734Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"G7tVCFwbfpdQ0QG1wAfbA+IIGq4sj4U+7FBK3pKTiaQx4451+nf3e3ijWsR6kcHKUox4GG9lDBhQ5NeuhuHqCA==","signature_status":"signed_v1","signed_at":"2026-07-04T23:55:36.177298Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.07577","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:367c6370e05719385b39266ccea6c097b4717826dd923858ee133b0b2687d29b","sha256:0c47e5e70a334e484dbac9d08483b09d5f1e0ba6babe7244de2a9edf5502b7ef"],"state_sha256":"e3f6460627961609f857fa0df498688509f34076c84493bc6fa847b4bbe8d26b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zZ1hNcaSI7LufCL+i1ra0DG03grCDpagN0PUWzW8LAZVEePfqKH6FPga1TX6f3jlOSpAqaUX1nHY6uO4BSiJDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T05:24:13.606094Z","bundle_sha256":"d9ce23d83be4f4ba1d1c66c08e52b95745f0b75295c07f6f7dc340d49699f160"}}