NLO calculation of ε′/ε in QCD and QED within the lattice QCD framework

الأصل · EN

We present the results of our recent calculation of ε′/ ε at the Next-to-Leading (NLO) order in QCD and QED, in the framework of Effective Hamiltonians. The operator matrix elements are taken from lattice QCD, at a scale μ=2GeV. NLO corrections seem to lower the value of ε′/ε, favouring the experimental result of E731. Contributions from different operators are analyzed and dependence on, μ and Λ QCD discussed. (Talk given at the XXVIIIth Rencontres de Moriond, ``Electro-Weak Interactions and Unified Theories'', March 13-19 1993).