{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2008:UV3KLUEUUCX3MNIYK747COM5PJ","short_pith_number":"pith:UV3KLUEU","schema_version":"1.0","canonical_sha256":"a576a5d094a0afb6351857f9f1399d7a6234a334b81b7c05cb190c10daaf2ba5","source":{"kind":"arxiv","id":"0806.4586","version":2},"attestation_state":"computed","paper":{"title":"Low energy chiral constants from epsilon-regime simulations with improved Wilson fermions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-lat","authors_text":"Anna Hasenfratz, Roland Hoffmann, Stefan Schaefer","submitted_at":"2008-06-27T19:54:06Z","abstract_excerpt":"We present a lattice QCD calculation of the low energy constants of the leading order chiral Lagrangian. In these simulations the epsilon regime is reached by using tree-level improved nHYP Wilson fermions combined with reweighting in the quark mass. We analyze two point functions on two ensembles with lattices of size (1.85fm)^4 and (2.8fm)^4, and at several quark mass values between 4 and 20 MeV. The data are well fitted with next-to-leading order chiral perturbative formulae and predict F=90(4)MeV and Sigma^(1/3)=248(6)MeV in the MS-bar scheme at 2 GeV."},"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":"0806.4586","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2008-06-27T19:54:06Z","cross_cats_sorted":[],"title_canon_sha256":"3e9b1ae2f4be7a2b942a23b51cbd3f9b34309e46a2f46ad3c65e6f01c59403ed","abstract_canon_sha256":"a2f81d6c39108a0be39bee19f66fed9efeac3d0fe2889a86453e66e86fdc1e34"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:30:19.365286Z","signature_b64":"vF0RokpS7eqHk9srgYT6plqWvx2oCPGJUUWLtQzt2sxOyG1pHJukdfIWag4VFqduIcOxGwAnpybKwbnmGTh9CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a576a5d094a0afb6351857f9f1399d7a6234a334b81b7c05cb190c10daaf2ba5","last_reissued_at":"2026-07-04T15:30:19.364879Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:30:19.364879Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Low energy chiral constants from epsilon-regime simulations with improved Wilson fermions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-lat","authors_text":"Anna Hasenfratz, Roland Hoffmann, Stefan Schaefer","submitted_at":"2008-06-27T19:54:06Z","abstract_excerpt":"We present a lattice QCD calculation of the low energy constants of the leading order chiral Lagrangian. In these simulations the epsilon regime is reached by using tree-level improved nHYP Wilson fermions combined with reweighting in the quark mass. We analyze two point functions on two ensembles with lattices of size (1.85fm)^4 and (2.8fm)^4, and at several quark mass values between 4 and 20 MeV. The data are well fitted with next-to-leading order chiral perturbative formulae and predict F=90(4)MeV and Sigma^(1/3)=248(6)MeV in the MS-bar scheme at 2 GeV."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0806.4586","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/0806.4586/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":"0806.4586","created_at":"2026-07-04T15:30:19.364947+00:00"},{"alias_kind":"arxiv_version","alias_value":"0806.4586v2","created_at":"2026-07-04T15:30:19.364947+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0806.4586","created_at":"2026-07-04T15:30:19.364947+00:00"},{"alias_kind":"pith_short_12","alias_value":"UV3KLUEUUCX3","created_at":"2026-07-04T15:30:19.364947+00:00"},{"alias_kind":"pith_short_16","alias_value":"UV3KLUEUUCX3MNIY","created_at":"2026-07-04T15:30:19.364947+00:00"},{"alias_kind":"pith_short_8","alias_value":"UV3KLUEU","created_at":"2026-07-04T15:30:19.364947+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/UV3KLUEUUCX3MNIYK747COM5PJ","json":"https://pith.science/pith/UV3KLUEUUCX3MNIYK747COM5PJ.json","graph_json":"https://pith.science/api/pith-number/UV3KLUEUUCX3MNIYK747COM5PJ/graph.json","events_json":"https://pith.science/api/pith-number/UV3KLUEUUCX3MNIYK747COM5PJ/events.json","paper":"https://pith.science/paper/UV3KLUEU"},"agent_actions":{"view_html":"https://pith.science/pith/UV3KLUEUUCX3MNIYK747COM5PJ","download_json":"https://pith.science/pith/UV3KLUEUUCX3MNIYK747COM5PJ.json","view_paper":"https://pith.science/paper/UV3KLUEU","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0806.4586&json=true","fetch_graph":"https://pith.science/api/pith-number/UV3KLUEUUCX3MNIYK747COM5PJ/graph.json","fetch_events":"https://pith.science/api/pith-number/UV3KLUEUUCX3MNIYK747COM5PJ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/UV3KLUEUUCX3MNIYK747COM5PJ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/UV3KLUEUUCX3MNIYK747COM5PJ/action/storage_attestation","attest_author":"https://pith.science/pith/UV3KLUEUUCX3MNIYK747COM5PJ/action/author_attestation","sign_citation":"https://pith.science/pith/UV3KLUEUUCX3MNIYK747COM5PJ/action/citation_signature","submit_replication":"https://pith.science/pith/UV3KLUEUUCX3MNIYK747COM5PJ/action/replication_record"}},"created_at":"2026-07-04T15:30:19.364947+00:00","updated_at":"2026-07-04T15:30:19.364947+00:00"}