{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:RCZLMANEJ3Q7KGYWBEUSR7DRHC","short_pith_number":"pith:RCZLMANE","schema_version":"1.0","canonical_sha256":"88b2b601a44ee1f51b16092928fc713896a57b86acd50536f248ad3d0e2a3f88","source":{"kind":"arxiv","id":"1106.5059","version":2},"attestation_state":"computed","paper":{"title":"Tensor Tilt from Primordial B-modes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Brian A. Powell","submitted_at":"2011-06-24T20:24:07Z","abstract_excerpt":"A primordial cosmic microwave background B-mode is widely considered a \"smoking gun\" signature of an early period of inflationary expansion. However, competing theories of the origin of structure, including string gases and bouncing cosmologies, also produce primordial tensor perturbations that give rise to a B-mode. These models can be differentiated by the scale dependence of their tensor spectra: inflation predicts a red tilt ($n_T<0$), string gases and loop quantum cosmology predict a blue tilt ($n_T>0$), while a nonsingular matter bounce gives zero tilt ($n_T=0$). We perform a Bayesian an"},"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":"1106.5059","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-06-24T20:24:07Z","cross_cats_sorted":[],"title_canon_sha256":"4a111b2556f689b4eed2ebc52eba47b01987a7dd706a4a3cf57df503e34c0b3c","abstract_canon_sha256":"e71ca19030fce36f57eb3cc3f1a6db1a0e1b6a546dcb37ccc8334ad9d00e6cbe"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:48:58.125353Z","signature_b64":"VFMJBiNiQHR47BJq0epylXz8KELtGOzDDQTQzdW64kLSbY79F7uA/HMY9t76ZXVGMNuLMWHNFWNwwEOAJuinCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"88b2b601a44ee1f51b16092928fc713896a57b86acd50536f248ad3d0e2a3f88","last_reissued_at":"2026-05-17T23:48:58.124918Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:48:58.124918Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Tensor Tilt from Primordial B-modes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Brian A. Powell","submitted_at":"2011-06-24T20:24:07Z","abstract_excerpt":"A primordial cosmic microwave background B-mode is widely considered a \"smoking gun\" signature of an early period of inflationary expansion. However, competing theories of the origin of structure, including string gases and bouncing cosmologies, also produce primordial tensor perturbations that give rise to a B-mode. These models can be differentiated by the scale dependence of their tensor spectra: inflation predicts a red tilt ($n_T<0$), string gases and loop quantum cosmology predict a blue tilt ($n_T>0$), while a nonsingular matter bounce gives zero tilt ($n_T=0$). We perform a Bayesian an"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.5059","kind":"arxiv","version":2},"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":"1106.5059","created_at":"2026-05-17T23:48:58.124988+00:00"},{"alias_kind":"arxiv_version","alias_value":"1106.5059v2","created_at":"2026-05-17T23:48:58.124988+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.5059","created_at":"2026-05-17T23:48:58.124988+00:00"},{"alias_kind":"pith_short_12","alias_value":"RCZLMANEJ3Q7","created_at":"2026-05-18T12:26:41.206345+00:00"},{"alias_kind":"pith_short_16","alias_value":"RCZLMANEJ3Q7KGYW","created_at":"2026-05-18T12:26:41.206345+00:00"},{"alias_kind":"pith_short_8","alias_value":"RCZLMANE","created_at":"2026-05-18T12:26:41.206345+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/RCZLMANEJ3Q7KGYWBEUSR7DRHC","json":"https://pith.science/pith/RCZLMANEJ3Q7KGYWBEUSR7DRHC.json","graph_json":"https://pith.science/api/pith-number/RCZLMANEJ3Q7KGYWBEUSR7DRHC/graph.json","events_json":"https://pith.science/api/pith-number/RCZLMANEJ3Q7KGYWBEUSR7DRHC/events.json","paper":"https://pith.science/paper/RCZLMANE"},"agent_actions":{"view_html":"https://pith.science/pith/RCZLMANEJ3Q7KGYWBEUSR7DRHC","download_json":"https://pith.science/pith/RCZLMANEJ3Q7KGYWBEUSR7DRHC.json","view_paper":"https://pith.science/paper/RCZLMANE","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1106.5059&json=true","fetch_graph":"https://pith.science/api/pith-number/RCZLMANEJ3Q7KGYWBEUSR7DRHC/graph.json","fetch_events":"https://pith.science/api/pith-number/RCZLMANEJ3Q7KGYWBEUSR7DRHC/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/RCZLMANEJ3Q7KGYWBEUSR7DRHC/action/timestamp_anchor","attest_storage":"https://pith.science/pith/RCZLMANEJ3Q7KGYWBEUSR7DRHC/action/storage_attestation","attest_author":"https://pith.science/pith/RCZLMANEJ3Q7KGYWBEUSR7DRHC/action/author_attestation","sign_citation":"https://pith.science/pith/RCZLMANEJ3Q7KGYWBEUSR7DRHC/action/citation_signature","submit_replication":"https://pith.science/pith/RCZLMANEJ3Q7KGYWBEUSR7DRHC/action/replication_record"}},"created_at":"2026-05-17T23:48:58.124988+00:00","updated_at":"2026-05-17T23:48:58.124988+00:00"}