We present results for the kaon B parameter obtained by APE-100 from a sample of 100 configurations using the Wilson action and 200 configurations using the Clover action, on a 18(3) x 64 lattice at beta = 6.0. We have also compared the results for B-K using two different values for the effective coupling constant g. We observe a strong dependence of B-K on the prescription adopted for g in the Wilson case, contrary to the results of the Clover case which are almost unaffected by the choice of g.
Crisafulli, M., Donini, A., Lubicz, V., Martinelli, G., Rapuano, F., Ungarelli, C., et al. (1995). Quenched BK-parameter with the Wilson and Clover actions at beta=6.0. In Lattice 94 : proceedings of the XIIth International Symposium on Lattice Field Theory (pp.397-399).