{"paper":{"title":"Wilson chiral perturbation theory for dynamical twisted mass fermions vs lattice data - a case study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-lat","authors_text":"Krzysztof Cichy, Savvas Zafeiropoulos","submitted_at":"2016-12-05T09:57:59Z","abstract_excerpt":"We compute the low lying eigenvalues of the Hermitian Dirac operator in lattice QCD with $N_{\\rm f} = 2+1+1$ twisted mass fermions. We discuss whether these eigenvalues are in the $\\epsilon$-regime or the $p$-regime of Wilson chiral perturbation theory ($\\chi$PT) for twisted mass fermions. Reaching the deep $\\epsilon$-regime is practically unfeasible with presently typical simulation parameters, but still the few lowest eigenvalues of the employed ensemble evince some characteristic $\\epsilon$-regime features. With this conclusion in mind, we develop a fitting strategy to extract two low energ"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.01289","kind":"arxiv","version":3},"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"}