Toward the Continuum Limit of $B_K$ with the Quenched Kogut-Susskind Quark Action

Details Toward the Continuum Limit of $B_K$ with the Quenched Kogut-Susskind Quark Action Toward the Continuum Limit of $B_K$ with the Quenched Kogut-Susskind Quark Action

1996-08-25

arxiv.org/abs/hep-lat/9608134v1

Nucl.Phys.Proc.Suppl. 53 (1997) 341-344

Physics

High Energy Physics

High Energy Physics - Lattice

4 pages incl. 2 figures, Latex+espcrc2+epsf, Talk presented at LATTICE96(poster) by S. Aoki

Scientific paper

10.1016/S0920-5632(96)00655-X

We present new results of our ongoing project toward a precision determination of the kaon $B$ parameter with the Kogut-Susskind quark action in quenched QCD. New results taken at $\beta$=6.4 and $\beta=5.7$ suggest that an apparently linear $a$ dependence of $B_K$ previously observed for $\beta=5.85-6.2$ arises from a change of curvature from convex to concave as the lattice spacing is reduced. Fitting data for $\beta\geq 5.93$ with an $O(a^2)$ form yields $B_K$(NDR,2 GeV)=0.587(7)(17) in the continuum limit. We also describe a finite-size study of $B_K$ at $\beta=$ 6.0 and 6.4, and a reanalysis of the theoretical argument for $O(a^2)$ behavior.

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