{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:3IEI5WEGKE2T5DO2EEQVN7C5VW","short_pith_number":"pith:3IEI5WEG","schema_version":"1.0","canonical_sha256":"da088ed88651353e8dda212156fc5dad94e4be448b7fa04bb9908bf61422fa3f","source":{"kind":"arxiv","id":"2101.10330","version":2},"attestation_state":"computed","paper":{"title":"Breakdown of chiral perturbation theory for the axion hot dark matter bound","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.CO","hep-lat"],"primary_cat":"hep-ph","authors_text":"Gioacchino Piazza, Guido Martinelli, Luca Di Luzio","submitted_at":"2021-01-25T19:00:01Z","abstract_excerpt":"We show that the commonly adopted hot dark matter (HDM) bound on the axion mass $m_a \\lesssim$ 1 eV is not reliable, since it is obtained by extrapolating the chiral expansion in a region where the effective field theory breaks down. This is explicitly shown via the calculation of the axion-pion thermalization rate at the next-to-leading order in chiral perturbation theory. We finally advocate a strategy for a sound extraction of the axion HDM bound via lattice QCD techniques."},"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":"2101.10330","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2021-01-25T19:00:01Z","cross_cats_sorted":["astro-ph.CO","hep-lat"],"title_canon_sha256":"1f76d3adc2935cf4a4107fd9f35c106abd88b90d3caf87ab344f640697fae017","abstract_canon_sha256":"4c9b194d807aa86fcaf65e200f42d698958a084aedc8811c372db7b4c49cc5c0"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:50:28.751119Z","signature_b64":"Nlxelw51pQxbuDoRwz9+k35Z6bqoKl4t7zNnV1WqVC7ufzJkFFPHA6tPGINtu1TV5nicXAMhkjajOHCHW0xsDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"da088ed88651353e8dda212156fc5dad94e4be448b7fa04bb9908bf61422fa3f","last_reissued_at":"2026-07-05T02:50:28.750673Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:50:28.750673Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Breakdown of chiral perturbation theory for the axion hot dark matter bound","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.CO","hep-lat"],"primary_cat":"hep-ph","authors_text":"Gioacchino Piazza, Guido Martinelli, Luca Di Luzio","submitted_at":"2021-01-25T19:00:01Z","abstract_excerpt":"We show that the commonly adopted hot dark matter (HDM) bound on the axion mass $m_a \\lesssim$ 1 eV is not reliable, since it is obtained by extrapolating the chiral expansion in a region where the effective field theory breaks down. This is explicitly shown via the calculation of the axion-pion thermalization rate at the next-to-leading order in chiral perturbation theory. We finally advocate a strategy for a sound extraction of the axion HDM bound via lattice QCD techniques."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.10330","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2101.10330/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":"2101.10330","created_at":"2026-07-05T02:50:28.750737+00:00"},{"alias_kind":"arxiv_version","alias_value":"2101.10330v2","created_at":"2026-07-05T02:50:28.750737+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.10330","created_at":"2026-07-05T02:50:28.750737+00:00"},{"alias_kind":"pith_short_12","alias_value":"3IEI5WEGKE2T","created_at":"2026-07-05T02:50:28.750737+00:00"},{"alias_kind":"pith_short_16","alias_value":"3IEI5WEGKE2T5DO2","created_at":"2026-07-05T02:50:28.750737+00:00"},{"alias_kind":"pith_short_8","alias_value":"3IEI5WEG","created_at":"2026-07-05T02:50:28.750737+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2507.00383","citing_title":"Unified study of two-meson and axion-meson production from semileptonic tau decays within resonance chiral framework","ref_index":22,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/3IEI5WEGKE2T5DO2EEQVN7C5VW","json":"https://pith.science/pith/3IEI5WEGKE2T5DO2EEQVN7C5VW.json","graph_json":"https://pith.science/api/pith-number/3IEI5WEGKE2T5DO2EEQVN7C5VW/graph.json","events_json":"https://pith.science/api/pith-number/3IEI5WEGKE2T5DO2EEQVN7C5VW/events.json","paper":"https://pith.science/paper/3IEI5WEG"},"agent_actions":{"view_html":"https://pith.science/pith/3IEI5WEGKE2T5DO2EEQVN7C5VW","download_json":"https://pith.science/pith/3IEI5WEGKE2T5DO2EEQVN7C5VW.json","view_paper":"https://pith.science/paper/3IEI5WEG","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2101.10330&json=true","fetch_graph":"https://pith.science/api/pith-number/3IEI5WEGKE2T5DO2EEQVN7C5VW/graph.json","fetch_events":"https://pith.science/api/pith-number/3IEI5WEGKE2T5DO2EEQVN7C5VW/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3IEI5WEGKE2T5DO2EEQVN7C5VW/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3IEI5WEGKE2T5DO2EEQVN7C5VW/action/storage_attestation","attest_author":"https://pith.science/pith/3IEI5WEGKE2T5DO2EEQVN7C5VW/action/author_attestation","sign_citation":"https://pith.science/pith/3IEI5WEGKE2T5DO2EEQVN7C5VW/action/citation_signature","submit_replication":"https://pith.science/pith/3IEI5WEGKE2T5DO2EEQVN7C5VW/action/replication_record"}},"created_at":"2026-07-05T02:50:28.750737+00:00","updated_at":"2026-07-05T02:50:28.750737+00:00"}