Kaon matrix elements in domain-wall QCD with DBW2 gauge action

TL;DR

This paper reports on calculations of kaon decay constants and B-parameter using domain-wall QCD with DBW2 gauge action, addressing systematic errors and consistency with prior research.

Contribution

First quenched numerical study of kaon matrix elements employing DBW2 gauge action and domain-wall fermions by the RBC Collaboration.

Findings

Calculated decay constants and B_K values.

Discussion of systematic errors and consistency.

Foundation for future unquenched studies.

Abstract

We present calculations of the decay constants and kaon B-parameter $B_K$ as the first stage of RBC Collaboration's quenched numerical simulations using DBW2 gauge action and domain-wall fermions. Some of potential systematic errors and consistency to previous works are discussed.