{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:J3WYWD4Y6DSZ4LIV5WSLIKY7HM","short_pith_number":"pith:J3WYWD4Y","canonical_record":{"source":{"id":"2007.03484","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-07-07T14:15:42Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"05d06766f217a84dfc04fc3a9d5d8aba4c51ffaef27bd71c22196a15b1b8a811","abstract_canon_sha256":"e4c8a52ed1772aec3345138ae289042993928f76ca023566d3b3c90690e1612a"},"schema_version":"1.0"},"canonical_sha256":"4eed8b0f98f0e59e2d15eda4b42b1f3b043989c36d6d8e20a1a9235a3d93b1f6","source":{"kind":"arxiv","id":"2007.03484","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.03484","created_at":"2026-07-05T03:17:44Z"},{"alias_kind":"arxiv_version","alias_value":"2007.03484v2","created_at":"2026-07-05T03:17:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.03484","created_at":"2026-07-05T03:17:44Z"},{"alias_kind":"pith_short_12","alias_value":"J3WYWD4Y6DSZ","created_at":"2026-07-05T03:17:44Z"},{"alias_kind":"pith_short_16","alias_value":"J3WYWD4Y6DSZ4LIV","created_at":"2026-07-05T03:17:44Z"},{"alias_kind":"pith_short_8","alias_value":"J3WYWD4Y","created_at":"2026-07-05T03:17:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:J3WYWD4Y6DSZ4LIV5WSLIKY7HM","target":"record","payload":{"canonical_record":{"source":{"id":"2007.03484","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-07-07T14:15:42Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"05d06766f217a84dfc04fc3a9d5d8aba4c51ffaef27bd71c22196a15b1b8a811","abstract_canon_sha256":"e4c8a52ed1772aec3345138ae289042993928f76ca023566d3b3c90690e1612a"},"schema_version":"1.0"},"canonical_sha256":"4eed8b0f98f0e59e2d15eda4b42b1f3b043989c36d6d8e20a1a9235a3d93b1f6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:17:44.754308Z","signature_b64":"LCUkonDCAeyd6GCrMYy8onOq/qZdY9x6DahTndt/RSQLTUd4xvTFAWTUvbrLuWfuYawKwa5jOyY5bBfL0A3IDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4eed8b0f98f0e59e2d15eda4b42b1f3b043989c36d6d8e20a1a9235a3d93b1f6","last_reissued_at":"2026-07-05T03:17:44.753774Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:17:44.753774Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2007.03484","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":"2026-07-05T03:17:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KFXSQSo7qCeBt+6hto1UyvXN5OXyso8WgXww6p/VjndGixYc1NoRGxlR6qQAhz+MKSqgbOpXUkYPBoJpGJEKBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T19:56:59.780649Z"},"content_sha256":"55c448e4becd237bec657de8a89cbb6abbbbbffa8a01c79253e2f46cd80d8545","schema_version":"1.0","event_id":"sha256:55c448e4becd237bec657de8a89cbb6abbbbbffa8a01c79253e2f46cd80d8545"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:J3WYWD4Y6DSZ4LIV5WSLIKY7HM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gravitational dark matter production in Palatini preheating","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["gr-qc","hep-ph","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Alexandros Karam, Eemeli Tomberg, Martti Raidal","submitted_at":"2020-07-07T14:15:42Z","abstract_excerpt":"We study preheating in plateau inflation in the Palatini formulation of general relativity, in a special case that resembles Higgs inflation. It was previously shown that the oscillating inflaton field returns to the plateau repeatedly in this model, and this leads to tachyonic production of inflaton particles. We show that a minimally coupled spectator scalar field can be produced even more efficiently by a similar mechanism. The mechanism is purely gravitational, and the scalar field mass can be of order $10^{13}$ GeV, larger than the Hubble scale by many orders of magnitude, making this a c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.03484","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/2007.03484/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":"2026-07-05T03:17:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FqLteBZQvF5F5iG8lQTL3Id0KF0RzPXO1hI4jF2sLZNNqUy58qru2x3FyBVHLuhRXYxpGjzCt0Jj4XG5fndVDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T19:56:59.781254Z"},"content_sha256":"d94beb04506bc9a46e7c7b6390af63116d3063de0702bf2be18965e85861edc7","schema_version":"1.0","event_id":"sha256:d94beb04506bc9a46e7c7b6390af63116d3063de0702bf2be18965e85861edc7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/J3WYWD4Y6DSZ4LIV5WSLIKY7HM/bundle.json","state_url":"https://pith.science/pith/J3WYWD4Y6DSZ4LIV5WSLIKY7HM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/J3WYWD4Y6DSZ4LIV5WSLIKY7HM/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":"2026-08-12T19:56:59Z","links":{"resolver":"https://pith.science/pith/J3WYWD4Y6DSZ4LIV5WSLIKY7HM","bundle":"https://pith.science/pith/J3WYWD4Y6DSZ4LIV5WSLIKY7HM/bundle.json","state":"https://pith.science/pith/J3WYWD4Y6DSZ4LIV5WSLIKY7HM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/J3WYWD4Y6DSZ4LIV5WSLIKY7HM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:J3WYWD4Y6DSZ4LIV5WSLIKY7HM","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":"e4c8a52ed1772aec3345138ae289042993928f76ca023566d3b3c90690e1612a","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-07-07T14:15:42Z","title_canon_sha256":"05d06766f217a84dfc04fc3a9d5d8aba4c51ffaef27bd71c22196a15b1b8a811"},"schema_version":"1.0","source":{"id":"2007.03484","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.03484","created_at":"2026-07-05T03:17:44Z"},{"alias_kind":"arxiv_version","alias_value":"2007.03484v2","created_at":"2026-07-05T03:17:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.03484","created_at":"2026-07-05T03:17:44Z"},{"alias_kind":"pith_short_12","alias_value":"J3WYWD4Y6DSZ","created_at":"2026-07-05T03:17:44Z"},{"alias_kind":"pith_short_16","alias_value":"J3WYWD4Y6DSZ4LIV","created_at":"2026-07-05T03:17:44Z"},{"alias_kind":"pith_short_8","alias_value":"J3WYWD4Y","created_at":"2026-07-05T03:17:44Z"}],"graph_snapshots":[{"event_id":"sha256:d94beb04506bc9a46e7c7b6390af63116d3063de0702bf2be18965e85861edc7","target":"graph","created_at":"2026-07-05T03:17:44Z","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/2007.03484/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study preheating in plateau inflation in the Palatini formulation of general relativity, in a special case that resembles Higgs inflation. It was previously shown that the oscillating inflaton field returns to the plateau repeatedly in this model, and this leads to tachyonic production of inflaton particles. We show that a minimally coupled spectator scalar field can be produced even more efficiently by a similar mechanism. The mechanism is purely gravitational, and the scalar field mass can be of order $10^{13}$ GeV, larger than the Hubble scale by many orders of magnitude, making this a c","authors_text":"Alexandros Karam, Eemeli Tomberg, Martti Raidal","cross_cats":["gr-qc","hep-ph","hep-th"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-07-07T14:15:42Z","title":"Gravitational dark matter production in Palatini preheating"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.03484","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":"sha256:55c448e4becd237bec657de8a89cbb6abbbbbffa8a01c79253e2f46cd80d8545","target":"record","created_at":"2026-07-05T03:17:44Z","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":"e4c8a52ed1772aec3345138ae289042993928f76ca023566d3b3c90690e1612a","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-07-07T14:15:42Z","title_canon_sha256":"05d06766f217a84dfc04fc3a9d5d8aba4c51ffaef27bd71c22196a15b1b8a811"},"schema_version":"1.0","source":{"id":"2007.03484","kind":"arxiv","version":2}},"canonical_sha256":"4eed8b0f98f0e59e2d15eda4b42b1f3b043989c36d6d8e20a1a9235a3d93b1f6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4eed8b0f98f0e59e2d15eda4b42b1f3b043989c36d6d8e20a1a9235a3d93b1f6","first_computed_at":"2026-07-05T03:17:44.753774Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:17:44.753774Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LCUkonDCAeyd6GCrMYy8onOq/qZdY9x6DahTndt/RSQLTUd4xvTFAWTUvbrLuWfuYawKwa5jOyY5bBfL0A3IDg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:17:44.754308Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.03484","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:55c448e4becd237bec657de8a89cbb6abbbbbffa8a01c79253e2f46cd80d8545","sha256:d94beb04506bc9a46e7c7b6390af63116d3063de0702bf2be18965e85861edc7"],"state_sha256":"f9e9e76570a27d124952498f97adfed913482e3e0517bff2b3fc2cdd886f579a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HnAo/VjHBPITeYJgXjVQGCa7QNEo6z6Dbgsm8ZHz/hdGVcFsnsaLjv2uPEtYHTlUkJD6ex/JABN1rc6i1nSWDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T19:56:59.785315Z","bundle_sha256":"6314ef91e98e5f1fb783677e0b458f8b483d74570cbf01af9c74dd908d1e06c5"}}