{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:5AQ34SPRHJEV3KERY6VEE4UOP4","short_pith_number":"pith:5AQ34SPR","canonical_record":{"source":{"id":"2108.02785","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-08-05T18:00:02Z","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","astro-ph.HE"],"title_canon_sha256":"b8265ff4102bb7cf0d033e5efd9528415ac6e750a1148c95f58de183d756ff0b","abstract_canon_sha256":"0821faf71cccbda9bb3b12c4c3f2f293249ff4624b663017803ad9cde661c6a4"},"schema_version":"1.0"},"canonical_sha256":"e821be49f13a495da891c7aa42728e7f378da3336e526ab3bdfba018a5568046","source":{"kind":"arxiv","id":"2108.02785","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.02785","created_at":"2026-07-05T03:03:42Z"},{"alias_kind":"arxiv_version","alias_value":"2108.02785v1","created_at":"2026-07-05T03:03:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.02785","created_at":"2026-07-05T03:03:42Z"},{"alias_kind":"pith_short_12","alias_value":"5AQ34SPRHJEV","created_at":"2026-07-05T03:03:42Z"},{"alias_kind":"pith_short_16","alias_value":"5AQ34SPRHJEV3KER","created_at":"2026-07-05T03:03:42Z"},{"alias_kind":"pith_short_8","alias_value":"5AQ34SPR","created_at":"2026-07-05T03:03:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:5AQ34SPRHJEV3KERY6VEE4UOP4","target":"record","payload":{"canonical_record":{"source":{"id":"2108.02785","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-08-05T18:00:02Z","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","astro-ph.HE"],"title_canon_sha256":"b8265ff4102bb7cf0d033e5efd9528415ac6e750a1148c95f58de183d756ff0b","abstract_canon_sha256":"0821faf71cccbda9bb3b12c4c3f2f293249ff4624b663017803ad9cde661c6a4"},"schema_version":"1.0"},"canonical_sha256":"e821be49f13a495da891c7aa42728e7f378da3336e526ab3bdfba018a5568046","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:03:42.009732Z","signature_b64":"H6dS+KR5YSI4zXmTr+OAy4FlSiAzcUR7cKaM9OhZv0uF5L/St6jAKTSxnUQkmJspTOrSL+CJQD2M3L5+UtM+DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e821be49f13a495da891c7aa42728e7f378da3336e526ab3bdfba018a5568046","last_reissued_at":"2026-07-05T03:03:42.009331Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:03:42.009331Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2108.02785","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":"2026-07-05T03:03:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rAtrLo2l+KdAcWcxBq/U3gkVIa8aNTPMV0RLSzserbtZjLl31k88nhYNhlNj9VW04Cl2uzGXKHZfXXdRrURgAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-18T07:05:53.655961Z"},"content_sha256":"f5a0c2c2304ca0c93fa603943cc56c1a3197714922c79da31ae4d3b978d0fd0b","schema_version":"1.0","event_id":"sha256:f5a0c2c2304ca0c93fa603943cc56c1a3197714922c79da31ae4d3b978d0fd0b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:5AQ34SPRHJEV3KERY6VEE4UOP4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cosmologically Degenerate Fermions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.GA","astro-ph.HE"],"primary_cat":"hep-ph","authors_text":"Marcela Carena, Nina M. Coyle, Samuel D. McDermott, Ying-Ying Li, Yuhsin Tsai","submitted_at":"2021-08-05T18:00:02Z","abstract_excerpt":"Dark matter (DM) with a mass below a few keV must have a phase space distribution that differs substantially from the Standard Model particle thermal phase space: otherwise, it will free stream out of cosmic structures as they form. We observe that fermionic DM psi in this mass range will have a non-negligible momentum in the early Universe, even in the total absence of thermal kinetic energy. This is because the fermions were inevitably more dense at higher redshifts, and thus experienced Pauli degeneracy pressure. They fill up the lowest-momentum states, such that a typical fermion gains a m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.02785","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/2108.02785/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":"2026-07-05T03:03:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"i9f+4V9LMV9W0V8w900yMSqap34bMmttaIKl0e2B7+ZAg2l46DIM06kyepDdX6xRTwKmjqDe+Xq+SHuxfjaIBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-18T07:05:53.656336Z"},"content_sha256":"86950fc8406d73e631a1c4948af2a548a9c13e5c76839a9b4b8b9385d8c3784d","schema_version":"1.0","event_id":"sha256:86950fc8406d73e631a1c4948af2a548a9c13e5c76839a9b4b8b9385d8c3784d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5AQ34SPRHJEV3KERY6VEE4UOP4/bundle.json","state_url":"https://pith.science/pith/5AQ34SPRHJEV3KERY6VEE4UOP4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5AQ34SPRHJEV3KERY6VEE4UOP4/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":"2026-07-18T07:05:53Z","links":{"resolver":"https://pith.science/pith/5AQ34SPRHJEV3KERY6VEE4UOP4","bundle":"https://pith.science/pith/5AQ34SPRHJEV3KERY6VEE4UOP4/bundle.json","state":"https://pith.science/pith/5AQ34SPRHJEV3KERY6VEE4UOP4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5AQ34SPRHJEV3KERY6VEE4UOP4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:5AQ34SPRHJEV3KERY6VEE4UOP4","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":"0821faf71cccbda9bb3b12c4c3f2f293249ff4624b663017803ad9cde661c6a4","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-08-05T18:00:02Z","title_canon_sha256":"b8265ff4102bb7cf0d033e5efd9528415ac6e750a1148c95f58de183d756ff0b"},"schema_version":"1.0","source":{"id":"2108.02785","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.02785","created_at":"2026-07-05T03:03:42Z"},{"alias_kind":"arxiv_version","alias_value":"2108.02785v1","created_at":"2026-07-05T03:03:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.02785","created_at":"2026-07-05T03:03:42Z"},{"alias_kind":"pith_short_12","alias_value":"5AQ34SPRHJEV","created_at":"2026-07-05T03:03:42Z"},{"alias_kind":"pith_short_16","alias_value":"5AQ34SPRHJEV3KER","created_at":"2026-07-05T03:03:42Z"},{"alias_kind":"pith_short_8","alias_value":"5AQ34SPR","created_at":"2026-07-05T03:03:42Z"}],"graph_snapshots":[{"event_id":"sha256:86950fc8406d73e631a1c4948af2a548a9c13e5c76839a9b4b8b9385d8c3784d","target":"graph","created_at":"2026-07-05T03:03:42Z","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/2108.02785/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Dark matter (DM) with a mass below a few keV must have a phase space distribution that differs substantially from the Standard Model particle thermal phase space: otherwise, it will free stream out of cosmic structures as they form. We observe that fermionic DM psi in this mass range will have a non-negligible momentum in the early Universe, even in the total absence of thermal kinetic energy. This is because the fermions were inevitably more dense at higher redshifts, and thus experienced Pauli degeneracy pressure. They fill up the lowest-momentum states, such that a typical fermion gains a m","authors_text":"Marcela Carena, Nina M. Coyle, Samuel D. McDermott, Ying-Ying Li, Yuhsin Tsai","cross_cats":["astro-ph.CO","astro-ph.GA","astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-08-05T18:00:02Z","title":"Cosmologically Degenerate Fermions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.02785","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:f5a0c2c2304ca0c93fa603943cc56c1a3197714922c79da31ae4d3b978d0fd0b","target":"record","created_at":"2026-07-05T03:03:42Z","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":"0821faf71cccbda9bb3b12c4c3f2f293249ff4624b663017803ad9cde661c6a4","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-08-05T18:00:02Z","title_canon_sha256":"b8265ff4102bb7cf0d033e5efd9528415ac6e750a1148c95f58de183d756ff0b"},"schema_version":"1.0","source":{"id":"2108.02785","kind":"arxiv","version":1}},"canonical_sha256":"e821be49f13a495da891c7aa42728e7f378da3336e526ab3bdfba018a5568046","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e821be49f13a495da891c7aa42728e7f378da3336e526ab3bdfba018a5568046","first_computed_at":"2026-07-05T03:03:42.009331Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:03:42.009331Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"H6dS+KR5YSI4zXmTr+OAy4FlSiAzcUR7cKaM9OhZv0uF5L/St6jAKTSxnUQkmJspTOrSL+CJQD2M3L5+UtM+DQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:03:42.009732Z","signed_message":"canonical_sha256_bytes"},"source_id":"2108.02785","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f5a0c2c2304ca0c93fa603943cc56c1a3197714922c79da31ae4d3b978d0fd0b","sha256:86950fc8406d73e631a1c4948af2a548a9c13e5c76839a9b4b8b9385d8c3784d"],"state_sha256":"e9b6198ae9ce57b78d8c321be0aee3dc093a6fc60046f4cd53a84f3928ace01b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S9fmodH0Q1tOcjXQH25EBMCLtYZXmA1iGIrSEMUGqITtCePFpbJpLzt95XZCke64h+R4/+pwtFCKoJppP7AWCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-18T07:05:53.658550Z","bundle_sha256":"a7109ee605b33e17d7344465cd35a79423e6980e6ed56c307ae2c230033fcba0"}}