{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:MCIDOXTTEVO2CRI2TDICLDPVJ7","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":"576ff5d4d832e8dd149f24cd99d799b847124ad143982b01b28f1dbd25e145d8","cross_cats_sorted":["astro-ph.CO","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-09-10T20:00:02Z","title_canon_sha256":"005ca72096490bd00e44c59051ebf833b7f1349195113980c1ac7cef994896d8"},"schema_version":"1.0","source":{"id":"1209.2119","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.2119","created_at":"2026-05-18T03:40:13Z"},{"alias_kind":"arxiv_version","alias_value":"1209.2119v2","created_at":"2026-05-18T03:40:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.2119","created_at":"2026-05-18T03:40:13Z"},{"alias_kind":"pith_short_12","alias_value":"MCIDOXTTEVO2","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"MCIDOXTTEVO2CRI2","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"MCIDOXTT","created_at":"2026-05-18T12:27:14Z"}],"graph_snapshots":[{"event_id":"sha256:788befb6fed23857689f20e66a92c3727e9da45c295eb7010a40933cc337b821","target":"graph","created_at":"2026-05-18T03:40:13Z","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":"Recent analyses of cosmological data suggest the presence of an extra relativistic component beyond the Standard Model content. The Higgs-Dilaton cosmological model predicts the existence of a massless particle -the dilaton- associated with the spontaneous symmetry breaking of scale invariance and undetectable by any accelerator experiment. Its ultrarelativistic character makes it a suitable candidate for contributing to the effective number of light degrees of freedom in the Universe. In this Letter we analyze the dilaton production at the (p)reheating stage right after inflation and conclude","authors_text":"Javier Rubio, Juan Garcia-Bellido, Mikhail Shaposhnikov","cross_cats":["astro-ph.CO","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-09-10T20:00:02Z","title":"Higgs-Dilaton cosmology: Are there extra relativistic species?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.2119","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:e13d4d7eae81e98a6cb954d8d393b25f1b1bf4716c7a1a4f9d5814d4a08bc821","target":"record","created_at":"2026-05-18T03:40:13Z","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":"576ff5d4d832e8dd149f24cd99d799b847124ad143982b01b28f1dbd25e145d8","cross_cats_sorted":["astro-ph.CO","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-09-10T20:00:02Z","title_canon_sha256":"005ca72096490bd00e44c59051ebf833b7f1349195113980c1ac7cef994896d8"},"schema_version":"1.0","source":{"id":"1209.2119","kind":"arxiv","version":2}},"canonical_sha256":"6090375e73255da1451a98d0258df54ffc92f100eae886eabd531e175906a915","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6090375e73255da1451a98d0258df54ffc92f100eae886eabd531e175906a915","first_computed_at":"2026-05-18T03:40:13.855331Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:40:13.855331Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jAW9XIU/aPBNm5TYVTPfoKmCxYiXqhDVqadrCbyPoLMz9DIXFJy8vIyzUN4YBM2DXC3s/BC5sQwhNo5tGNT9Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:40:13.855922Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.2119","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e13d4d7eae81e98a6cb954d8d393b25f1b1bf4716c7a1a4f9d5814d4a08bc821","sha256:788befb6fed23857689f20e66a92c3727e9da45c295eb7010a40933cc337b821"],"state_sha256":"7a9ddd750378d24308a7acca019965a27315bde721d6ac01cae2da6e6df9138c"}