# Toward Precision Measurement of $B_K$ with Quenched Kogut-Susskind Quarks

## TL;DR

This paper reports on the progress of precisely measuring the kaon $B$ parameter using quenched Kogut-Susskind quarks, highlighting unexpected linear lattice spacing dependence contrary to theoretical expectations.

## Contribution

It provides new lattice QCD results for $B_K$ at multiple lattice spacings and discusses the observed deviation from expected $O(a^2)$ scaling.

## Key findings

- Results do not show expected $O(a^2)$ behavior
- Data suggests an $O(a)$ dependence
- Progress toward high-precision $B_K$ measurement

## Abstract

We present a status report of our ongoing effort toward a precision determination of the kaon $B$ parameter with the Kogut-Susskind quark action in quenched QCD. Results for $B_K$ so far accumulated at $\beta =5.85$, 5.93, 6.0 and 6.2 corresponding to $a^{-1}=1.3-2.6$ GeV do not exhibit the theoretically expected $O(a^2)$ behavior, but are apparently more consistent with an $O(a)$ behavior.