Dynamical determination of B_K from improved staggered quarks

Details Dynamical determination of B_K from improved staggered quarks Dynamical determination of B_K from improved staggered quarks

2005-09-30

arxiv.org/abs/hep-lat/0509188v1

PoS LAT2005:347,2006

Physics

High Energy Physics

High Energy Physics - Lattice

6 pages, 2 figures. Talk presented at Lattice 2005 (Dublin). To appear in Proceedings of Science

Scientific paper

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.

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