arXiv:hep-lat/0509188·v1·High Energy Physics — Lattice
Dynamical determination of B_K from improved staggered quarks
E. Gamiz🇬🇧 · S. Collins🇬🇧 · C. T. H. Davies🇬🇧 · J. Shigemitsu🇺🇸 · M. Wingate (HPQCD and UKQCD collaborations)🇺🇸
Abstract
The scaling corrections that affected previous staggered calculations of B_K 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 B_K 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.
Comments: 6 pages, 2 figures. Talk presented at Lattice 2005 (Dublin). To appear in Proceedings of Science