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The Kaon B-parameter from Quenched Domain-Wall QCD

Authors
  • Aoki, Y.
  • Blum, T.
  • Christ, N. H.
  • Dawson, C.
  • Izubuchi, T.
  • Mawhinney, R. D.
  • Noaki, J.
  • Ohta, S.
  • Orginos, K.
  • Soni, A.
  • Yamada, N.
Type
Published Article
Publication Date
May 15, 2006
Submission Date
Aug 15, 2005
Identifiers
DOI: 10.1103/PhysRevD.73.094507
arXiv ID: hep-lat/0508011
Source
arXiv
License
Unknown
External links

Abstract

We present numerical results for the kaon B-parameter, B_K, determined in the quenched approximation of lattice QCD. Our simulations are performed using domain-wall fermions and the renormalization group improved, DBW2 gauge action which combine to give quarks with good chiral symmetry at finite lattice spacing. Operators are renormalized non-perturbatively using the RI/MOM scheme. We study scaling by performing the simulation on two different lattices with a^{-1} = 1.982(30) and 2.914(54) GeV. We combine this quenched scaling study with an earlier calculation of B_K using two flavors of dynamical, domain-wall quarks at a single lattice spacing to obtain B_K(MS,NDR,mu=2GeV)=0.563(21)(39)(30), were the first error is statistical, the second systematic (without quenching errors) and the third estimates the error due to quenching.

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