{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:JFZWMV233CKQ2DRLYHRNRHJDAB","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":"447f2257e829d7c7f015dbd69d3755e13f31987c53efd924b9b507b194252cb0","cross_cats_sorted":[],"license":"","primary_cat":"hep-th","submitted_at":"2006-10-26T16:24:21Z","title_canon_sha256":"72cb5651a37e256a8f3efc92acafc44dcfca935ad1c50de873c1f3268d372aee"},"schema_version":"1.0","source":{"id":"hep-th/0610282","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-th/0610282","created_at":"2026-05-18T04:38:26Z"},{"alias_kind":"arxiv_version","alias_value":"hep-th/0610282v3","created_at":"2026-05-18T04:38:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-th/0610282","created_at":"2026-05-18T04:38:26Z"},{"alias_kind":"pith_short_12","alias_value":"JFZWMV233CKQ","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"JFZWMV233CKQ2DRL","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"JFZWMV23","created_at":"2026-05-18T12:25:54Z"}],"graph_snapshots":[{"event_id":"sha256:d8c5d5195871e1885d9ed1141eaa044334d7ea106c6c8ea8116d2c01f41b0554","target":"graph","created_at":"2026-05-18T04:38:26Z","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":"The braneworld model of Dvali-Gabadadze-Porrati realizes the self-accelerating universe. However, it is known that this cosmological solution contains a spin-2 ghost. We study the possibility of avoiding the appearance of the ghost by slightly modifying the model, introducing the second brane. First we consider a simple model without stabilization of the separation of the brane. By changing the separation between the branes, we find we can erase the spin-2 ghost. However, this can be done only at the expense of the appearance of a spin-0 ghost instead. We discuss why these two different types ","authors_text":"Kazuya Koyama, Keisuke Izumi, Takahiro Tanaka","cross_cats":[],"headline":"","license":"","primary_cat":"hep-th","submitted_at":"2006-10-26T16:24:21Z","title":"Unexorcized ghost in DGP brane world"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-th/0610282","kind":"arxiv","version":3},"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:dc7d19e2c8481126c3964af7a0101e000d0f29fedeb4f2537a7e19eb8bfb2599","target":"record","created_at":"2026-05-18T04:38:26Z","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":"447f2257e829d7c7f015dbd69d3755e13f31987c53efd924b9b507b194252cb0","cross_cats_sorted":[],"license":"","primary_cat":"hep-th","submitted_at":"2006-10-26T16:24:21Z","title_canon_sha256":"72cb5651a37e256a8f3efc92acafc44dcfca935ad1c50de873c1f3268d372aee"},"schema_version":"1.0","source":{"id":"hep-th/0610282","kind":"arxiv","version":3}},"canonical_sha256":"497366575bd8950d0e2bc1e2d89d230041ec6fc6ad89fad3b64026fd2379e03e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"497366575bd8950d0e2bc1e2d89d230041ec6fc6ad89fad3b64026fd2379e03e","first_computed_at":"2026-05-18T04:38:26.194953Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:38:26.194953Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vwg58OY/uXOBSANT9d1TDVnKdmcAkkzrxxPLXIFlr5svrtrMVIaT6PeE2lLjhrksddgV2qOS3KSnUcJg+q3xAA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:38:26.195660Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-th/0610282","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dc7d19e2c8481126c3964af7a0101e000d0f29fedeb4f2537a7e19eb8bfb2599","sha256:d8c5d5195871e1885d9ed1141eaa044334d7ea106c6c8ea8116d2c01f41b0554"],"state_sha256":"4ce8e4d2065fce1a58b3b084e576f785743d3de7ffff151315ef1fb89a227980"}