The kaon B-parameter from unquenched mixed action lattice QCD

Christopher Aubin, John W Laiho, Ruth S. Van De Water

Research output: Contribution to journalConference article

2 Scopus citations

Abstract

We present a preliminary calculation of BK using domain-wall valence quarks and 2+1 flavors of improved staggered sea quarks. Both the size of the residual quark mass, which measures the amount of chiral symmetry breaking, and of the mixed meson splitting ∆mix, a measure of taste-symmetry breaking, show that discretization effects are under control in our mixed action lattice simulations. We show preliminary data for pseudoscalar meson masses, decay constants and BK. We discuss general issues associated with the chiral extrapolation of lattice data, and, as an example, present a preliminary chiral and continuum extrapolation of fπ. The quality of our data shows that the good chiral properties of domain-wall quarks, in combination with the light sea quark masses and multiple lattice spacings available with the MILC staggered configurations, will allow for a precise determination of BK

Original languageEnglish (US)
Article number375
JournalProceedings of Science
Volume42
StatePublished - Jan 1 2007
Externally publishedYes
Event25th International Symposium on Lattice Field Theory, LATTICE 2007 - Regensburg, Germany
Duration: Jul 30 2007Aug 4 2007

ASJC Scopus subject areas

  • General

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