Calculating $B_K$ using HYP staggered fermions

Details Calculating $B_K$ using HYP staggered fermions Calculating $B_K$ using HYP staggered fermions

2008-09-07

arxiv.org/abs/0809.1220v2

PoS LATTICE2008:275,2008

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 4 figures, Lattice 2008 proceeding

Scientific paper

We give an update on our calculation of $B_K$ using HYP-smeared valence staggered quarks. We have results for $B_K$ at tree-level on several coarse MILC lattices ($a\approx 0.12 $fm) and one of the fine lattices ($a\approx 0.09 $fm), using 10 light valence quarks ranging down to $m_s^{\rm phys}/10$. We have generalized staggered chiral perturbation theory to our mixed action setup, and outline the results. We explain our present fitting strategy, and give some preliminary results.

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