ΔS = 2 and ΔI = matrix elements in quenched QCD

Abstract We present preliminary results for B K , B 3 2 7 and B 3 2 8 from two high-statistics lattice computations. These calculations are performed at β = 6.0 and 6.2 in the quenched approximation, using mean-field-improved Sheikholeslami-Wohlert fermionic actions.