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Direct CP violation and the ΔI=1/2 rule in K→ππ decay from the standard model

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Abbott, R. ; Blum, T. ; Boyle, P. A. ; Bruno, M. ; Christ, N. H. ; Hoying, D. ; Jung, C. ; Kelly, C. ; Lehner, C. ; Mawhinney, R. D. ; Murphy, D. J. ; Sachrajda, C. T. ; Soni, A. ; Tomii, M. ; Wang, T.
License: Creative Commons Attribution 4.0
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Date of publication of this fulltext: 01 Apr 2021 13:57


We present a lattice QCD calculation of the ΔI=1/2, K→ππ decay amplitude A0 and ϵ′, the measure of direct CP violation in K→ππ decay, improving our 2015 calculation [1] of these quantities. Both calculations were performed with physical kinematics on a 323×64 lattice with an inverse lattice spacing of a−1=1.3784(68)  GeV. However, the current calculation includes nearly 4 times the statistics and ...


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