{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:2A67UJ5JLBFDBAYU25ZPLPQFZV","short_pith_number":"pith:2A67UJ5J","canonical_record":{"source":{"id":"1803.07048","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-03-19T17:23:03Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"871506e8c1baa6653978dcc9888acac8f300fbb66ac60d396ca8e8cf24eddb39","abstract_canon_sha256":"5b864ce43bf858921a0e50206bd8112154177e13beeddde3019f295a9e4b42c7"},"schema_version":"1.0"},"canonical_sha256":"d03dfa27a9584a308314d772f5be05cd75797afb86d7c8b0ccc2adb8a720374a","source":{"kind":"arxiv","id":"1803.07048","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.07048","created_at":"2026-05-18T00:05:50Z"},{"alias_kind":"arxiv_version","alias_value":"1803.07048v2","created_at":"2026-05-18T00:05:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.07048","created_at":"2026-05-18T00:05:50Z"},{"alias_kind":"pith_short_12","alias_value":"2A67UJ5JLBFD","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"2A67UJ5JLBFDBAYU","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"2A67UJ5J","created_at":"2026-05-18T12:31:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:2A67UJ5JLBFDBAYU25ZPLPQFZV","target":"record","payload":{"canonical_record":{"source":{"id":"1803.07048","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-03-19T17:23:03Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"871506e8c1baa6653978dcc9888acac8f300fbb66ac60d396ca8e8cf24eddb39","abstract_canon_sha256":"5b864ce43bf858921a0e50206bd8112154177e13beeddde3019f295a9e4b42c7"},"schema_version":"1.0"},"canonical_sha256":"d03dfa27a9584a308314d772f5be05cd75797afb86d7c8b0ccc2adb8a720374a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:05:50.881714Z","signature_b64":"s1FEF8MxQTxyg9ffmAVr+68B1h/qbRXQbuNwRJ4O/adp1NN57UlH2W3cOkEbVHBqIabkBVupmeJRRKTyf0exDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d03dfa27a9584a308314d772f5be05cd75797afb86d7c8b0ccc2adb8a720374a","last_reissued_at":"2026-05-18T00:05:50.881227Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:05:50.881227Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.07048","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":"2026-05-18T00:05:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O5x/cdeD9WF72XAWwAI7OyI5s49EIGIvorIdU6tADFih9/VWJluHYbJfRajR8sUzAJW5fiAYI9Z0zicZ6kidBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T14:10:47.816366Z"},"content_sha256":"a54bd7cf00648d493c12fd42232689d8c6343bda56d28b3ffad62f295e918846","schema_version":"1.0","event_id":"sha256:a54bd7cf00648d493c12fd42232689d8c6343bda56d28b3ffad62f295e918846"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:2A67UJ5JLBFDBAYU25ZPLPQFZV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"New Physics in the Rayleigh-Jeans Tail of the CMB","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"hep-ph","authors_text":"Alfredo Urbano, Josef Pradler, Joshua T. Ruderman, Maxim Pospelov","submitted_at":"2018-03-19T17:23:03Z","abstract_excerpt":"We show that despite stringent constraints on the shape of the main part of the CMB spectrum, there is considerable room for its modification within its Rayleigh-Jeans (RJ) end, $\\omega \\ll T_{\\rm CMB}$. We construct explicit New Physics models that give an order one (or larger) increase of photon count in the RJ tail, which can be tested by existing and upcoming experiments aiming to detect the cosmological 21 cm emission/absorption signal. This class of models stipulates the decay of unstable particles to dark photons, $A'$, that have a small mass, $m_{A'} \\sim 10^{-14} - 10^{-9}$ eV, non-va"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.07048","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":""},"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":"2026-05-18T00:05:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ag7Rg+BUXgnM70v3LLajwezM1DlG9u3XFDeHff4o2zvnzJwb6BMxK/IiylrJfxMtW4AhlAovXWjDyXyhhxEtDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T14:10:47.817087Z"},"content_sha256":"7b116862e278772d43375ed5679bb384d57f4e0d837170cccca58d07c4a99b11","schema_version":"1.0","event_id":"sha256:7b116862e278772d43375ed5679bb384d57f4e0d837170cccca58d07c4a99b11"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2A67UJ5JLBFDBAYU25ZPLPQFZV/bundle.json","state_url":"https://pith.science/pith/2A67UJ5JLBFDBAYU25ZPLPQFZV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2A67UJ5JLBFDBAYU25ZPLPQFZV/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":"2026-05-23T14:10:47Z","links":{"resolver":"https://pith.science/pith/2A67UJ5JLBFDBAYU25ZPLPQFZV","bundle":"https://pith.science/pith/2A67UJ5JLBFDBAYU25ZPLPQFZV/bundle.json","state":"https://pith.science/pith/2A67UJ5JLBFDBAYU25ZPLPQFZV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2A67UJ5JLBFDBAYU25ZPLPQFZV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:2A67UJ5JLBFDBAYU25ZPLPQFZV","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":"5b864ce43bf858921a0e50206bd8112154177e13beeddde3019f295a9e4b42c7","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-03-19T17:23:03Z","title_canon_sha256":"871506e8c1baa6653978dcc9888acac8f300fbb66ac60d396ca8e8cf24eddb39"},"schema_version":"1.0","source":{"id":"1803.07048","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.07048","created_at":"2026-05-18T00:05:50Z"},{"alias_kind":"arxiv_version","alias_value":"1803.07048v2","created_at":"2026-05-18T00:05:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.07048","created_at":"2026-05-18T00:05:50Z"},{"alias_kind":"pith_short_12","alias_value":"2A67UJ5JLBFD","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"2A67UJ5JLBFDBAYU","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"2A67UJ5J","created_at":"2026-05-18T12:31:59Z"}],"graph_snapshots":[{"event_id":"sha256:7b116862e278772d43375ed5679bb384d57f4e0d837170cccca58d07c4a99b11","target":"graph","created_at":"2026-05-18T00:05:50Z","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 show that despite stringent constraints on the shape of the main part of the CMB spectrum, there is considerable room for its modification within its Rayleigh-Jeans (RJ) end, $\\omega \\ll T_{\\rm CMB}$. We construct explicit New Physics models that give an order one (or larger) increase of photon count in the RJ tail, which can be tested by existing and upcoming experiments aiming to detect the cosmological 21 cm emission/absorption signal. This class of models stipulates the decay of unstable particles to dark photons, $A'$, that have a small mass, $m_{A'} \\sim 10^{-14} - 10^{-9}$ eV, non-va","authors_text":"Alfredo Urbano, Josef Pradler, Joshua T. Ruderman, Maxim Pospelov","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-03-19T17:23:03Z","title":"New Physics in the Rayleigh-Jeans Tail of the CMB"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.07048","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:a54bd7cf00648d493c12fd42232689d8c6343bda56d28b3ffad62f295e918846","target":"record","created_at":"2026-05-18T00:05:50Z","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":"5b864ce43bf858921a0e50206bd8112154177e13beeddde3019f295a9e4b42c7","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-03-19T17:23:03Z","title_canon_sha256":"871506e8c1baa6653978dcc9888acac8f300fbb66ac60d396ca8e8cf24eddb39"},"schema_version":"1.0","source":{"id":"1803.07048","kind":"arxiv","version":2}},"canonical_sha256":"d03dfa27a9584a308314d772f5be05cd75797afb86d7c8b0ccc2adb8a720374a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d03dfa27a9584a308314d772f5be05cd75797afb86d7c8b0ccc2adb8a720374a","first_computed_at":"2026-05-18T00:05:50.881227Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:05:50.881227Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"s1FEF8MxQTxyg9ffmAVr+68B1h/qbRXQbuNwRJ4O/adp1NN57UlH2W3cOkEbVHBqIabkBVupmeJRRKTyf0exDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:05:50.881714Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.07048","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a54bd7cf00648d493c12fd42232689d8c6343bda56d28b3ffad62f295e918846","sha256:7b116862e278772d43375ed5679bb384d57f4e0d837170cccca58d07c4a99b11"],"state_sha256":"681ab4c3d54fb7bc8de7a4c5f9febc20466f713c3aecbd85f6cf757391ef0592"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+b3MDuFROHvbQcLUiz/be+D1MGRaejnIK1JYC9Pco6mC83DIeSr4UDt0quXN388Sp+7wd18XyxcJRTHxsUMDAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T14:10:47.820924Z","bundle_sha256":"5fba2beaa519397a1bcb667089b98f31334158421347b7400795b3421748a56b"}}