{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:2NSDJ3PH5S44H5G2IZVOHYXHG6","short_pith_number":"pith:2NSDJ3PH","canonical_record":{"source":{"id":"2307.11665","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-07-21T16:07:51Z","cross_cats_sorted":["astro-ph.CO","astro-ph.HE","hep-ph"],"title_canon_sha256":"2144f833486485e332cb89a7d9639e55b380f7df152f04bd365692fc7efb23f2","abstract_canon_sha256":"25b835a6b16f2500c885592993259bd7ee7c0ed3d38e0c897c33613d49625cff"},"schema_version":"1.0"},"canonical_sha256":"d36434ede7ecb9c3f4da466ae3e2e73787dc8c2669c5e58b7d8971523aebbd3f","source":{"kind":"arxiv","id":"2307.11665","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2307.11665","created_at":"2026-07-05T08:16:21Z"},{"alias_kind":"arxiv_version","alias_value":"2307.11665v2","created_at":"2026-07-05T08:16:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2307.11665","created_at":"2026-07-05T08:16:21Z"},{"alias_kind":"pith_short_12","alias_value":"2NSDJ3PH5S44","created_at":"2026-07-05T08:16:21Z"},{"alias_kind":"pith_short_16","alias_value":"2NSDJ3PH5S44H5G2","created_at":"2026-07-05T08:16:21Z"},{"alias_kind":"pith_short_8","alias_value":"2NSDJ3PH","created_at":"2026-07-05T08:16:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:2NSDJ3PH5S44H5G2IZVOHYXHG6","target":"record","payload":{"canonical_record":{"source":{"id":"2307.11665","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-07-21T16:07:51Z","cross_cats_sorted":["astro-ph.CO","astro-ph.HE","hep-ph"],"title_canon_sha256":"2144f833486485e332cb89a7d9639e55b380f7df152f04bd365692fc7efb23f2","abstract_canon_sha256":"25b835a6b16f2500c885592993259bd7ee7c0ed3d38e0c897c33613d49625cff"},"schema_version":"1.0"},"canonical_sha256":"d36434ede7ecb9c3f4da466ae3e2e73787dc8c2669c5e58b7d8971523aebbd3f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:16:21.584534Z","signature_b64":"I5tamOyEFncPeNjcN6Cvn5y9vBFM8+mSh/4ZUxi4xLs0/2LLPi8kAMXN2UnE5imjB943vzTo40N/JS/Wzkr2CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d36434ede7ecb9c3f4da466ae3e2e73787dc8c2669c5e58b7d8971523aebbd3f","last_reissued_at":"2026-07-05T08:16:21.584091Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:16:21.584091Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2307.11665","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":"2026-07-05T08:16:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZwDCtKX8+KxorqhRdzS9HGt0WYHFftXMz68a9APaeyLrMk3OXeprUOKBVCUYN6G9EfZE8aoYrv4KxWcn//qDDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T17:11:29.849382Z"},"content_sha256":"ec98e9301e35004d703d76ae87f64f31bc3c00cbf53742f64e82ab2e0b9a9d7f","schema_version":"1.0","event_id":"sha256:ec98e9301e35004d703d76ae87f64f31bc3c00cbf53742f64e82ab2e0b9a9d7f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:2NSDJ3PH5S44H5G2IZVOHYXHG6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Novel tests of gravity using nano-Hertz stochastic gravitational-wave background signals","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.HE","hep-ph"],"primary_cat":"gr-qc","authors_text":"Enrico Cannizzaro, Gabriele Franciolini, Paolo Pani","submitted_at":"2023-07-21T16:07:51Z","abstract_excerpt":"Gravity theories that modify General Relativity in the slow-motion regime can introduce nonperturbative corrections to the stochastic gravitational-wave background~(SGWB) from supermassive black-hole binaries in the nano-Hertz band, while remaining perturbative in the highly-relativistic regime and satisfying current post-Newtonian~(PN) constraints. We present a model-agnostic formalism to map such theories into a modified tilt for the SGWB spectrum, showing that negative PN corrections (in particular -2PN) can alleviate the tension in the recent pulsar-timing-array data if the detected SGWB i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.11665","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/2307.11665/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":"2026-07-05T08:16:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RtCcYth/6eA2tcyq4i4LYpMuHdnm2meNFZdioEPHunSxz2ovh9sVhxXvpbw1HjabHiJdySBX4UfL1H/pG/GRAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T17:11:29.849915Z"},"content_sha256":"bd71180930bbb355c2a23ef15ab862d25b737c3c5651a99badaca33d44e9f6f7","schema_version":"1.0","event_id":"sha256:bd71180930bbb355c2a23ef15ab862d25b737c3c5651a99badaca33d44e9f6f7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2NSDJ3PH5S44H5G2IZVOHYXHG6/bundle.json","state_url":"https://pith.science/pith/2NSDJ3PH5S44H5G2IZVOHYXHG6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2NSDJ3PH5S44H5G2IZVOHYXHG6/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":"2026-08-18T17:11:29Z","links":{"resolver":"https://pith.science/pith/2NSDJ3PH5S44H5G2IZVOHYXHG6","bundle":"https://pith.science/pith/2NSDJ3PH5S44H5G2IZVOHYXHG6/bundle.json","state":"https://pith.science/pith/2NSDJ3PH5S44H5G2IZVOHYXHG6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2NSDJ3PH5S44H5G2IZVOHYXHG6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:2NSDJ3PH5S44H5G2IZVOHYXHG6","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":"25b835a6b16f2500c885592993259bd7ee7c0ed3d38e0c897c33613d49625cff","cross_cats_sorted":["astro-ph.CO","astro-ph.HE","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-07-21T16:07:51Z","title_canon_sha256":"2144f833486485e332cb89a7d9639e55b380f7df152f04bd365692fc7efb23f2"},"schema_version":"1.0","source":{"id":"2307.11665","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2307.11665","created_at":"2026-07-05T08:16:21Z"},{"alias_kind":"arxiv_version","alias_value":"2307.11665v2","created_at":"2026-07-05T08:16:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2307.11665","created_at":"2026-07-05T08:16:21Z"},{"alias_kind":"pith_short_12","alias_value":"2NSDJ3PH5S44","created_at":"2026-07-05T08:16:21Z"},{"alias_kind":"pith_short_16","alias_value":"2NSDJ3PH5S44H5G2","created_at":"2026-07-05T08:16:21Z"},{"alias_kind":"pith_short_8","alias_value":"2NSDJ3PH","created_at":"2026-07-05T08:16:21Z"}],"graph_snapshots":[{"event_id":"sha256:bd71180930bbb355c2a23ef15ab862d25b737c3c5651a99badaca33d44e9f6f7","target":"graph","created_at":"2026-07-05T08:16:21Z","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/2307.11665/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Gravity theories that modify General Relativity in the slow-motion regime can introduce nonperturbative corrections to the stochastic gravitational-wave background~(SGWB) from supermassive black-hole binaries in the nano-Hertz band, while remaining perturbative in the highly-relativistic regime and satisfying current post-Newtonian~(PN) constraints. We present a model-agnostic formalism to map such theories into a modified tilt for the SGWB spectrum, showing that negative PN corrections (in particular -2PN) can alleviate the tension in the recent pulsar-timing-array data if the detected SGWB i","authors_text":"Enrico Cannizzaro, Gabriele Franciolini, Paolo Pani","cross_cats":["astro-ph.CO","astro-ph.HE","hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-07-21T16:07:51Z","title":"Novel tests of gravity using nano-Hertz stochastic gravitational-wave background signals"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.11665","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:ec98e9301e35004d703d76ae87f64f31bc3c00cbf53742f64e82ab2e0b9a9d7f","target":"record","created_at":"2026-07-05T08:16:21Z","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":"25b835a6b16f2500c885592993259bd7ee7c0ed3d38e0c897c33613d49625cff","cross_cats_sorted":["astro-ph.CO","astro-ph.HE","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-07-21T16:07:51Z","title_canon_sha256":"2144f833486485e332cb89a7d9639e55b380f7df152f04bd365692fc7efb23f2"},"schema_version":"1.0","source":{"id":"2307.11665","kind":"arxiv","version":2}},"canonical_sha256":"d36434ede7ecb9c3f4da466ae3e2e73787dc8c2669c5e58b7d8971523aebbd3f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d36434ede7ecb9c3f4da466ae3e2e73787dc8c2669c5e58b7d8971523aebbd3f","first_computed_at":"2026-07-05T08:16:21.584091Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:16:21.584091Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"I5tamOyEFncPeNjcN6Cvn5y9vBFM8+mSh/4ZUxi4xLs0/2LLPi8kAMXN2UnE5imjB943vzTo40N/JS/Wzkr2CQ==","signature_status":"signed_v1","signed_at":"2026-07-05T08:16:21.584534Z","signed_message":"canonical_sha256_bytes"},"source_id":"2307.11665","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ec98e9301e35004d703d76ae87f64f31bc3c00cbf53742f64e82ab2e0b9a9d7f","sha256:bd71180930bbb355c2a23ef15ab862d25b737c3c5651a99badaca33d44e9f6f7"],"state_sha256":"884df6e1e6027628faddbc5bf718426e5957b672b128bf492c57031acfcd4abf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iaaFyNBsmJwLhjv7vER7O75UXmez1zCPGjW0Jphq+nxWFGIK2Ap42H4cGsjgKJuCO4U4euqfHPbz2k33qSoLAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T17:11:29.855236Z","bundle_sha256":"55d2402f99c48352d27f4b1e15e811a14143fb4f06040093305ea2b9cc29d94f"}}