The Kaon B-parameter with the Wilson Quark Action using Chiral Ward Identities
JLQCD Collaboration, S. Aoki, M. Fukugita, S. Hashimoto, N. Ishizuka, Y. Iwasaki, K. Kanaya, Y. Kuramashi, M. Okawa, A. Ukawa, T. Yoshié
Abstract
We present a detailed description of the method and results of our calculation of the kaon B parameter using the Wilson quark action in quenched QCD at β=5.9-6.5. The mixing problem of the Δs=2 four-quark operators is solved non-perturbatively with full use of chiral Ward identities. We find BK(NDR, 2 GeV)=0.562(64) in the continuum limit, which agrees with the value obtained with the Kogut-Susskind quark action.
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