{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:B4M74RTDVRAHFAYIIYFGKMGHNN","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":"23c301ea9844864eb0647bd66253f944e5b87e44e4b5e6d98d257d15a7a06b8b","cross_cats_sorted":["astro-ph.CO","gr-qc","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2012-05-29T04:29:28Z","title_canon_sha256":"c80e623eaeb37147b2299700b3ccd48ae33369f3774e7b97b97dd7db5346797e"},"schema_version":"1.0","source":{"id":"1205.6261","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.6261","created_at":"2026-05-18T02:21:09Z"},{"alias_kind":"arxiv_version","alias_value":"1205.6261v2","created_at":"2026-05-18T02:21:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.6261","created_at":"2026-05-18T02:21:09Z"},{"alias_kind":"pith_short_12","alias_value":"B4M74RTDVRAH","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"B4M74RTDVRAHFAYI","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"B4M74RTD","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:a78a1a760e2d69e044eb6c9da55d348c5d1de548919293922bfe7d1d773776be","target":"graph","created_at":"2026-05-18T02:21:09Z","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":"Motivated by the couplings of the dilaton in four-dimensional effective actions, we investigate the cosmological consequences of a scalar field coupled both to matter and a Maxwell-type vector field. The vector field has a background isotropy-violating component. New anisotropic scaling solutions which can be responsible for the matter and dark energy dominated epochs are identified and explored. For a large parameter region the universe expands almost isotropically. Using that the CMB quadrupole is extremely sensitive to shear, we constrain the ratio of the matter coupling to the vector coupl","authors_text":"David F. Mota, Mikjel Thorsrud, Sigbj{\\o}rn Hervik","cross_cats":["astro-ph.CO","gr-qc","hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2012-05-29T04:29:28Z","title":"Cosmology of a Scalar Field Coupled to Matter and an Isotropy-Violating Maxwell Field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.6261","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:a650a8c0eb37040ebb45bf3f7e03fbb62fe2bba5746d99298898d19239e2c701","target":"record","created_at":"2026-05-18T02:21:09Z","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":"23c301ea9844864eb0647bd66253f944e5b87e44e4b5e6d98d257d15a7a06b8b","cross_cats_sorted":["astro-ph.CO","gr-qc","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2012-05-29T04:29:28Z","title_canon_sha256":"c80e623eaeb37147b2299700b3ccd48ae33369f3774e7b97b97dd7db5346797e"},"schema_version":"1.0","source":{"id":"1205.6261","kind":"arxiv","version":2}},"canonical_sha256":"0f19fe4663ac40728308460a6530c76b70900d61f716e051bb1cf1925a3c21a5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0f19fe4663ac40728308460a6530c76b70900d61f716e051bb1cf1925a3c21a5","first_computed_at":"2026-05-18T02:21:09.296086Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:21:09.296086Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vpxXWkt3sroYfGjef7F2FbVCU/vTtiR3kQmjJjaS+SPQrz94IR8m8+A44Wk44kGlMoxLa+6Rw6+X1g6aCsPYAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:21:09.296616Z","signed_message":"canonical_sha256_bytes"},"source_id":"1205.6261","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a650a8c0eb37040ebb45bf3f7e03fbb62fe2bba5746d99298898d19239e2c701","sha256:a78a1a760e2d69e044eb6c9da55d348c5d1de548919293922bfe7d1d773776be"],"state_sha256":"e4c5b4c85ef04b38acd1b7983d9f1f71b398267d8e49c72eec71cf911212345e"}