Next-to-leading order short distance QCD corrections to the effective $ΔS = 2$ Hamiltonian, implications for the $K_L$-$K_S$ mass difference

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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4 pages and 2 figures, uses LaTeX espcrc2 documentstyle option (all necessary files included in an uuencoded compressed tar fi

Scientific paper

10.1016/0920-5632(95)00083-L

We report on the results of a calculation of next-to leading order short distance QCD corrections to the coefficient $\eta_1$ of the effective $\Delta S = 2$ Lagrangian in the standard model and discuss the uncertainties inherent in such a calculation. As a phenomenological application we comment on the contributions of short distance physics to the ${\rm K}_{\rm L}$--${\rm K}_{\rm S}$ mass difference. This report is based on research work done in collaboration with Ulrich Nierste.

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