2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/103348We present preliminary results of $B_K$ calculated using improved staggered fermions with the mixed action (valence quarks = HYP staggered fermions and sea quarks = AsqTad staggered fermions). We analyze the data based upon the prediction by Van de Water and Sharpe. A hint of consistency with the prediction is observed. We also present preliminary results of $B_8^{(3/2)}$ and $B_7^{(3/2)}$.6 pages, 7 figures, lattice 2005 proceeding, references are updatedHigh Energy Physics - Latticetext