{"paper":{"title":"A New Estimate of $\\varepsilon '/\\varepsilon$","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"J.O. Eeg, M. Fabbrichesi, S. Bertolini","submitted_at":"1995-12-19T22:34:13Z","abstract_excerpt":"We discuss direct $CP$ violation in the standard model by giving a new estimate of $\\varepsilon'/\\varepsilon$ in kaon decays. Our analysis is based on the evaluation of the hadronic matrix elements of the \\mbox{$\\Delta S =1$} effective quark lagrangian by means of the chiral quark model, with the inclusion of meson one-loop renormalization and NLO Wilson coefficients. Our estimate is fully consistent with the $\\Delta I =1/2$ selection rule in $K\\to \\pi\\pi$ decays which is well reproduced within the same framework. By varying all parameters in the allowed ranges and, in particular, taking the q"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9512356","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"}