NLO calculation of $ε^{\prime}/ε$ in QCD and QED within the lattice QCD framework

Details NLO calculation of $ε^{\prime}/ε$ in QCD and QED within the lattice QCD framework NLO calculation of $ε^{\prime}/ε$ in QCD and QED within the lattice QCD framework

1993-05-06

arxiv.org/abs/hep-ph/9305217v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, LaTeX, figures available on request, ULB-TH 93/04

Scientific paper

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

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