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Neutral-kaon mixing from (2+1)-flavor domain-wall QCD |
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| Authors: | Antonio D J Boyle P A Blum T Christ N H Cohen S D Dawson C Izubuchi T Kenway R D Jung C Li S Lin M F Mawhinney R D Noaki J Ohta S Pendleton B J Scholz E E Soni A Tweedie R J Yamaguchi A;RBC and UKQCD Collaborations |
| Institution: | SUPA, School of Physics, The University of Edinburgh, Edinburgh, United Kingdom. |
| 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};{MSover ]}(2 GeV)=0.524(10)(28) where the first error is statistical and the second incorporates estimates for all systematic errors. |
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