{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2014:5CVUVJZAUFIS57Y7ZD5PAGVJPV","short_pith_number":"pith:5CVUVJZA","schema_version":"1.0","canonical_sha256":"e8ab4aa720a1512eff1fc8faf01aa97d662dc61572c6592fa0243340975efa4a","source":{"kind":"arxiv","id":"1403.5732","version":1},"attestation_state":"computed","paper":{"title":"Blue Gravity Waves from BICEP2 ?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-ph"],"primary_cat":"astro-ph.CO","authors_text":"Alessandro Melchiorri, Andrea Marchini, Eleonora Di Valentino, Laura Salvati, Luca Pagano, Martina Gerbino","submitted_at":"2014-03-23T09:42:15Z","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"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1403.5732","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-03-23T09:42:15Z","cross_cats_sorted":["gr-qc","hep-ph"],"title_canon_sha256":"f9a51f74eeb0a107c1012862cd144e0b1398e517ecbdef78123c49461e40d305","abstract_canon_sha256":"406d1edad0287dc99cda326c3fded89a40eefaba5128d4992aba2d359a262507"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:45:49.471073Z","signature_b64":"hEqO3dXdiS0QsWaHw4bxcoHbS2pjFReehZNpsgoHcpzOAP/qzGLjr7luOMYYKC+G059ahyIt0bZ/okwOeV0eBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e8ab4aa720a1512eff1fc8faf01aa97d662dc61572c6592fa0243340975efa4a","last_reissued_at":"2026-05-18T02:45:49.470616Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:45:49.470616Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Blue Gravity Waves from BICEP2 ?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-ph"],"primary_cat":"astro-ph.CO","authors_text":"Alessandro Melchiorri, Andrea Marchini, Eleonora Di Valentino, Laura Salvati, Luca Pagano, Martina Gerbino","submitted_at":"2014-03-23T09:42:15Z","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"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.5732","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1403.5732","created_at":"2026-05-18T02:45:49.470685+00:00"},{"alias_kind":"arxiv_version","alias_value":"1403.5732v1","created_at":"2026-05-18T02:45:49.470685+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.5732","created_at":"2026-05-18T02:45:49.470685+00:00"},{"alias_kind":"pith_short_12","alias_value":"5CVUVJZAUFIS","created_at":"2026-05-18T12:28:14.216126+00:00"},{"alias_kind":"pith_short_16","alias_value":"5CVUVJZAUFIS57Y7","created_at":"2026-05-18T12:28:14.216126+00:00"},{"alias_kind":"pith_short_8","alias_value":"5CVUVJZA","created_at":"2026-05-18T12:28:14.216126+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/5CVUVJZAUFIS57Y7ZD5PAGVJPV","json":"https://pith.science/pith/5CVUVJZAUFIS57Y7ZD5PAGVJPV.json","graph_json":"https://pith.science/api/pith-number/5CVUVJZAUFIS57Y7ZD5PAGVJPV/graph.json","events_json":"https://pith.science/api/pith-number/5CVUVJZAUFIS57Y7ZD5PAGVJPV/events.json","paper":"https://pith.science/paper/5CVUVJZA"},"agent_actions":{"view_html":"https://pith.science/pith/5CVUVJZAUFIS57Y7ZD5PAGVJPV","download_json":"https://pith.science/pith/5CVUVJZAUFIS57Y7ZD5PAGVJPV.json","view_paper":"https://pith.science/paper/5CVUVJZA","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1403.5732&json=true","fetch_graph":"https://pith.science/api/pith-number/5CVUVJZAUFIS57Y7ZD5PAGVJPV/graph.json","fetch_events":"https://pith.science/api/pith-number/5CVUVJZAUFIS57Y7ZD5PAGVJPV/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/5CVUVJZAUFIS57Y7ZD5PAGVJPV/action/timestamp_anchor","attest_storage":"https://pith.science/pith/5CVUVJZAUFIS57Y7ZD5PAGVJPV/action/storage_attestation","attest_author":"https://pith.science/pith/5CVUVJZAUFIS57Y7ZD5PAGVJPV/action/author_attestation","sign_citation":"https://pith.science/pith/5CVUVJZAUFIS57Y7ZD5PAGVJPV/action/citation_signature","submit_replication":"https://pith.science/pith/5CVUVJZAUFIS57Y7ZD5PAGVJPV/action/replication_record"}},"created_at":"2026-05-18T02:45:49.470685+00:00","updated_at":"2026-05-18T02:45:49.470685+00:00"}