Lattice QCD Calculation of the Kaon B-parameter with the Wilson Quark Action

Details Lattice QCD Calculation of the Kaon B-parameter with the Wilson Quark Action Lattice QCD Calculation of the Kaon B-parameter with the Wilson Quark Action

1997-05-26

arxiv.org/abs/hep-lat/9705035v1

Phys.Rev.Lett. 81 (1998) 1778-1781

Physics

High Energy Physics

High Energy Physics - Lattice

11 pages, latex source-file, 4 figures as ps-file

Scientific paper

10.1103/PhysRevLett.81.1778

The kaon B parameter is calculated in quenched lattice QCD with the Wilson quark action. The mixing problem of the \Delta s=2 four-quark operators is solved non-perturbatively with full use of chiral Ward identities, and this method enables us to construct the weak four-quark operators exhibiting good chiral behavior. We find B_K(NDR, 2GeV)=0.562(64) in the continuum limit, which agrees with the value obtained with the Kogut-Susskind quark action.

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