出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present a preliminary calculation of BK using domain-wall valence quarks and 2+1 flavors
of improved staggered sea quarks. Both the size of the residual quark mass, which measures
the amount of chiral symmetry breaking, and of the mixed meson splitting Dmix, a measure of
taste-symmetry breaking, show that discretization effects are under control in our mixed action
lattice simulations. We show preliminary data for pseudoscalar meson masses, decay constants
and BK. We discuss general issues associated with the chiral extrapolation of lattice data, and, as
an example, present a preliminary chiral and continuum extrapolation of fp . The quality of our
data shows that the good chiral properties of domain-wall quarks, in combination with the light
sea quark masses and multiple lattice spacings available with theMILC staggered configurations,
will allow for a precise determination of BK.
