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Kaon B-parameter from unquenched mixed action lattice QCD

Presenter: Ruth Van de Water — Fermilab

C. Aubin, J. Laiho, and R. Van de Water

We present a preliminary calculation of BK using domain-wall valence quarks and 2+1 flavors of improved staggered sea quarks. We show that the good chiral properties of domain-wall quarks, in combination with the light sea quark masses available with the MILC configurations, allow for a precise determination of BK.