2008/10/14 by Panying Chen, H. W. Ke, Hongwei Ke +1 · 7 citations
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #CP violation #Cabibbo–Kobayashi–Maskawa matrix #Geometry #Hadron #Lattice (music) #Mathematics #Operator (biology) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Scale (ratio) #Symmetry (geometry) #hep-ph
paper · pdf · open access · doi:10.1016/j.physletb.2009.04.016
published in Physics Letters B 677(3-4), 157-159 (Elsevier BV) · 2 figures
arxiv created 2008/10/14 · openalex publication_date 2009/04/10 · arxiv updated 2010/04/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We calculate the new contribution to the direct CP-violation parameter ϵ ′ in K → π π decay in the minimal left–right symmetric model with the recently-obtained right-handed quark Cabibbo–Kobayashi–Maskawa mixing. We pay particular attention to the uncertainty in the hadronic matrix element of a leading four-quark operator O − L R . We find that it can be related to the standard model electromagnetic penguin operator O 8 through SU ( 3 ) L × SU ( 3 ) R chiral symmetry. Using the lattice and large N c calculations, we obtain a robust constraint on the minimal left–right symmetric scale M W R > 5 TeV from the experimental data on ϵ ′ .