Standard Model Prediction for Direct CP Violation in K→ππ Decay.

@article{Bai2015StandardMP,
  title={Standard Model Prediction for Direct CP Violation in K→ππ Decay.},
  author={Ziyuan Bai and Thomas Blum and Peter A. Boyle and Norman H. Christ and Julien Frison and Nicolas Garron and Taku Izubuchi and Chulwoo Jung and Cassandra D Kelly and Christoph Lehner and Robert D. Mawhinney and Christopher Tadeusz Czeslaw Sachrajda and Amarjit Soni and Datong Zhang},
  journal={Physical review letters},
  year={2015},
  volume={115 21},
  pages={
          212001
        }
}
We report the first lattice QCD calculation of the complex kaon decay amplitude A_{0} with physical kinematics, using a 32³×64 lattice volume and a single lattice spacing a, with 1/a=1.3784(68) GeV. We find Re(A_{0})=4.66(1.00)(1.26)×10(-7) GeV and Im(A_{0})=-1.90(1.23)(1.08)×10(-11) GeV, where the first error is statistical and the second systematic. The first value is in approximate agreement with the experimental result: Re(A_{0})=3.3201(18)×10(-7) GeV, while the second can be used to… CONTINUE READING

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