Dynamical determination of BK from improved staggered quarks
E. Gamiz, S. Collins, C. T. H. Davies, J. Shigemitsu, M. Wingate
Abstract
The scaling corrections that affected previous staggered calculations of BK have been proved to be reduced by using improved actions (HYP, Asqtad) in the quenched approximation. This improved behaviour allows us to perform a reliable dynamical calculation of BK including quark vacuum polarization effects using the MILC (2+1) flavour dynamical configurations. We report here on the results from such dynamical calculation. We also discuss the renormalization effects with the Asqtad action.
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