出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：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) avour dynamical congurations. We report here on
the results from such dynamical calculation. We also discuss the renormalization effects with the
Asqtad action.
