In light of a discrepancy of the direct CP violation in K→ππ
decays, ε′/εK, we investigate gluino contributions to
the electroweak penguin, where flavor violations are induced by squark
trilinear couplings. Top-Yukawa contributions to ΔS=2 observables are
taken into account, and vacuum stability conditions are evaluated in detail. It
is found that this scenario can explain the discrepancy of
ε′/εK for the squark mass smaller than 5.6 TeV. We also
show that the gluino contributions can amplify B(K→πνν), B(KS→μ+μ−)eff and ΔACP(b→sγ). Such large effects could be measured in future
experiments.Comment: 30 pages, 8 figures; references added, version published in JHE