{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:5CVUVJZAUFIS57Y7ZD5PAGVJPV","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":"406d1edad0287dc99cda326c3fded89a40eefaba5128d4992aba2d359a262507","cross_cats_sorted":["gr-qc","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-03-23T09:42:15Z","title_canon_sha256":"f9a51f74eeb0a107c1012862cd144e0b1398e517ecbdef78123c49461e40d305"},"schema_version":"1.0","source":{"id":"1403.5732","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.5732","created_at":"2026-05-18T02:45:49Z"},{"alias_kind":"arxiv_version","alias_value":"1403.5732v1","created_at":"2026-05-18T02:45:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.5732","created_at":"2026-05-18T02:45:49Z"},{"alias_kind":"pith_short_12","alias_value":"5CVUVJZAUFIS","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"5CVUVJZAUFIS57Y7","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"5CVUVJZA","created_at":"2026-05-18T12:28:14Z"}],"graph_snapshots":[{"event_id":"sha256:323b42dd8b997e8ba5945794b66f0fd2c0fbf99a8a4c62d07ca30ecee31d2fb8","target":"graph","created_at":"2026-05-18T02:45:49Z","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 present new constraints on the spectral index n_T of tensor fluctuations from the recent data obtained by the BICEP2 experiment. We found that the BICEP2 data alone slightly prefers a positive, \"blue\", spectral index with n_T=1.36\\pm0.83 at 68 % c.l.. However, when a TT prior on the tensor amplitude coming from temperature anisotropy measurements is assumed we get n_T=1.67\\pm0.53 at 68 % c.l., ruling out a scale invariant $n_T=0$ spectrum at more than three standard deviations. These results are at odds with current bounds on the tensor spectral index coming from pulsar timing, Big Bang Nuc","authors_text":"Alessandro Melchiorri, Andrea Marchini, Eleonora Di Valentino, Laura Salvati, Luca Pagano, Martina Gerbino","cross_cats":["gr-qc","hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-03-23T09:42:15Z","title":"Blue Gravity Waves from BICEP2 ?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.5732","kind":"arxiv","version":1},"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":"sha256:6fff5c916fcb705bb54bca2793b4ddc6e5e1a52c63e25b042b37d09842d74061","target":"record","created_at":"2026-05-18T02:45:49Z","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":"406d1edad0287dc99cda326c3fded89a40eefaba5128d4992aba2d359a262507","cross_cats_sorted":["gr-qc","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-03-23T09:42:15Z","title_canon_sha256":"f9a51f74eeb0a107c1012862cd144e0b1398e517ecbdef78123c49461e40d305"},"schema_version":"1.0","source":{"id":"1403.5732","kind":"arxiv","version":1}},"canonical_sha256":"e8ab4aa720a1512eff1fc8faf01aa97d662dc61572c6592fa0243340975efa4a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e8ab4aa720a1512eff1fc8faf01aa97d662dc61572c6592fa0243340975efa4a","first_computed_at":"2026-05-18T02:45:49.470616Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:45:49.470616Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hEqO3dXdiS0QsWaHw4bxcoHbS2pjFReehZNpsgoHcpzOAP/qzGLjr7luOMYYKC+G059ahyIt0bZ/okwOeV0eBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:45:49.471073Z","signed_message":"canonical_sha256_bytes"},"source_id":"1403.5732","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6fff5c916fcb705bb54bca2793b4ddc6e5e1a52c63e25b042b37d09842d74061","sha256:323b42dd8b997e8ba5945794b66f0fd2c0fbf99a8a4c62d07ca30ecee31d2fb8"],"state_sha256":"7c46db32c66b9414601557540828396f744c2bf8a5ec1a9712a02a5547e66399"}