{"paper":{"title":"Exploring the role of the charm quark in the $\\Delta I=1/2$ rule","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-lat","authors_text":"Carlos Pena, Eric Endress","submitted_at":"2014-02-04T18:46:57Z","abstract_excerpt":"We study the dependence on the charm quark mass of the leading-order low-energy constants of the $\\Delta S=1$ effective Hamiltonian, with the aim of elucidating the role of the charm mass scale in the $\\Delta I=1/2$ rule for $K\\to\\pi\\pi$ decay. To that purpose, finite-volume Chiral Perturbation Theory predictions are matched to QCD simulations, performed in the quenched approximation with overlap fermions and $m_u=m_d=m_s$. Light quark masses range between a few MeV up to around one third of the physical strange mass, while charm masses range between $m_u$ and a few hundred MeV. Novel variance"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.0827","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"}