Calculating $B_K$ using HYP staggered fermions

Abstract

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 $m_s^{\mathrm{phys}}/10$. 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.

7 pages, 4 figures, Lattice 2008 proceeding

References in corpus (2)

• Physical Results from 2+1 Flavor Domain Wall QCD and SU(2) Chiral Perturbation Theory
• Taste symmetry breaking with HYP-smeared staggered fermions

Cited by in corpus (3)

• Full nonperturbative QCD simulations with 2+1 flavors of improved staggered quarks
• Kaon physics: a lattice perspective
• Determination of $B_K$ using improved staggered fermions (I): SU(3) chiral perturbation theory fit