Neutral-kaon mixing from (2+1)-flavor domain-wall QCD.
/ Authors
D. Antonio, P. Boyle, T. Blum, N. Christ, Saul D. Cohen, C. Dawson, T. Izubuchi, R. Kenway, C. Jung, S. Li
and 9 more authors
Meifeng Lin, R. Mawhinney, J. Noaki, S. Ohta, B. Pendleton, E. Scholz, A. Soni, R. Tweedie, A. Yamaguchi
/ Abstract
We present the first results for neutral-kaon mixing using (2+1)-flavors of domain-wall fermions. A new approach is used to extrapolate to the physical up and down quark masses from our numerical studies with pion masses in the range 240-420 MeV; only SU(2)_{L}xSU(2)_{R} chiral symmetry is assumed and the kaon is not assumed to be light. Our main result is B_{K};{MS[over ]}(2 GeV)=0.524(10)(28) where the first error is statistical and the second incorporates estimates for all systematic errors.
Journal: Physical review letters