Supersymmetric corrections to $ε^\prime /εat the leading order in QCD and QED

Abstract

We study the corrections to ${\epsilon }^{\prime }/\epsilon$ in the minimal supersymmetric model at the leading order in QCD and QED. Supersymmetry can increase the standard model prediction for ${\epsilon }^{\prime }/\epsilon$ by at most 40\% for $m_t=174$ GeV, an enhancement which is indistinguishable from the present theoretical uncertainties. The most conspicuous effect of supersymmetry is a strong depletion of ${\epsilon }^{\prime }/\epsilon$. For certain choices of supersymmetric parameters, vanishing and even small negative values of ${\epsilon }^{\prime }/\epsilon$ can be obtained for the top quark in the CDF range.

27 pages, CERN--TH.7381/94 AND PREP. N.1016/94

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