{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:QKPGQ26ZOUSHPPM7SCEDSCMKYF","short_pith_number":"pith:QKPGQ26Z","schema_version":"1.0","canonical_sha256":"829e686bd9752477bd9f908839098ac154850ff2c82eda15d3bfe85d0772ee51","source":{"kind":"arxiv","id":"2109.14627","version":4},"attestation_state":"computed","paper":{"title":"Neutrino Flavor Pendulum Reloaded: The Case of Fast Pairwise Conversion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"astro-ph.HE","authors_text":"Georg G. Raffelt (Max Planck Institute for Physics), Ian Padilla-Gay, Irene Tamborra (Niels Bohr Institute)","submitted_at":"2021-09-29T18:00:03Z","abstract_excerpt":"In core-collapse supernovae or compact binary merger remnants, neutrino-neutrino refraction can spawn fast pair conversion of the type $\\nu_e \\bar\\nu_e \\leftrightarrow \\nu_x \\bar\\nu_x$ (with $x=\\mu, \\tau$), governed by the angle-dependent density matrices of flavor lepton number. In a homogeneous and axially symmetric two-flavor system, all angle modes evolve coherently, and we show that the nonlinear equations of motion are formally equivalent to those of a gyroscopic pendulum. Within this analogy, our main innovation is to identify the elusive characteristic of the lepton-number angle distri"},"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":"2109.14627","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-09-29T18:00:03Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"73a1a2a8474668897812846835349b0bfc0a9ccace19c3c99754ff38101364dc","abstract_canon_sha256":"66412da10da34d081daddfcf1af875453d91780ebfe2a718c5e64e991b5a8853"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:13:54.357106Z","signature_b64":"785ZhEMuXeuJTO1dz8KxFfnSmnLph+MWfi/A9gzjqRf27lDNOXYt0UJbuJy4ILFTNaZS+vb+C6nS+6NM1eHCDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"829e686bd9752477bd9f908839098ac154850ff2c82eda15d3bfe85d0772ee51","last_reissued_at":"2026-07-05T05:13:54.356656Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:13:54.356656Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Neutrino Flavor Pendulum Reloaded: The Case of Fast Pairwise Conversion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"astro-ph.HE","authors_text":"Georg G. Raffelt (Max Planck Institute for Physics), Ian Padilla-Gay, Irene Tamborra (Niels Bohr Institute)","submitted_at":"2021-09-29T18:00:03Z","abstract_excerpt":"In core-collapse supernovae or compact binary merger remnants, neutrino-neutrino refraction can spawn fast pair conversion of the type $\\nu_e \\bar\\nu_e \\leftrightarrow \\nu_x \\bar\\nu_x$ (with $x=\\mu, \\tau$), governed by the angle-dependent density matrices of flavor lepton number. In a homogeneous and axially symmetric two-flavor system, all angle modes evolve coherently, and we show that the nonlinear equations of motion are formally equivalent to those of a gyroscopic pendulum. Within this analogy, our main innovation is to identify the elusive characteristic of the lepton-number angle distri"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.14627","kind":"arxiv","version":4},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2109.14627/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2109.14627","created_at":"2026-07-05T05:13:54.356714+00:00"},{"alias_kind":"arxiv_version","alias_value":"2109.14627v4","created_at":"2026-07-05T05:13:54.356714+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.14627","created_at":"2026-07-05T05:13:54.356714+00:00"},{"alias_kind":"pith_short_12","alias_value":"QKPGQ26ZOUSH","created_at":"2026-07-05T05:13:54.356714+00:00"},{"alias_kind":"pith_short_16","alias_value":"QKPGQ26ZOUSHPPM7","created_at":"2026-07-05T05:13:54.356714+00:00"},{"alias_kind":"pith_short_8","alias_value":"QKPGQ26Z","created_at":"2026-07-05T05:13:54.356714+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":4,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2605.27506","citing_title":"Neutrino-antineutrino superfluidity","ref_index":46,"is_internal_anchor":false},{"citing_arxiv_id":"2605.16504","citing_title":"Neutrino Flavor Conversion Shapes the Rate of Failed Core-collapse Supernovae","ref_index":71,"is_internal_anchor":false},{"citing_arxiv_id":"2605.18972","citing_title":"Flavor Conversion Enhances or Suppresses Supernova Explodability Independent of the Progenitor Mass","ref_index":48,"is_internal_anchor":false},{"citing_arxiv_id":"2604.25687","citing_title":"Collective neutrino-antineutrino pair oscillations","ref_index":22,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/QKPGQ26ZOUSHPPM7SCEDSCMKYF","json":"https://pith.science/pith/QKPGQ26ZOUSHPPM7SCEDSCMKYF.json","graph_json":"https://pith.science/api/pith-number/QKPGQ26ZOUSHPPM7SCEDSCMKYF/graph.json","events_json":"https://pith.science/api/pith-number/QKPGQ26ZOUSHPPM7SCEDSCMKYF/events.json","paper":"https://pith.science/paper/QKPGQ26Z"},"agent_actions":{"view_html":"https://pith.science/pith/QKPGQ26ZOUSHPPM7SCEDSCMKYF","download_json":"https://pith.science/pith/QKPGQ26ZOUSHPPM7SCEDSCMKYF.json","view_paper":"https://pith.science/paper/QKPGQ26Z","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2109.14627&json=true","fetch_graph":"https://pith.science/api/pith-number/QKPGQ26ZOUSHPPM7SCEDSCMKYF/graph.json","fetch_events":"https://pith.science/api/pith-number/QKPGQ26ZOUSHPPM7SCEDSCMKYF/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QKPGQ26ZOUSHPPM7SCEDSCMKYF/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QKPGQ26ZOUSHPPM7SCEDSCMKYF/action/storage_attestation","attest_author":"https://pith.science/pith/QKPGQ26ZOUSHPPM7SCEDSCMKYF/action/author_attestation","sign_citation":"https://pith.science/pith/QKPGQ26ZOUSHPPM7SCEDSCMKYF/action/citation_signature","submit_replication":"https://pith.science/pith/QKPGQ26ZOUSHPPM7SCEDSCMKYF/action/replication_record"}},"created_at":"2026-07-05T05:13:54.356714+00:00","updated_at":"2026-07-05T05:13:54.356714+00:00"}