Miscellanies of K⁰ - K̄⁰ mixing and B_K

Abstract

We have computed BK, using two different methods with staggered fermions on a 163 × 40 lattice at β = 5.7 with two dynamical flavors of a mass 0.01. Using an improved wall source method, we have studied a series of non-degenerate quark antiquark pairs and observed no effect on BK, although effects were seen on the individual terms making up BK.