Direct CP violation and the $\Delta I=1/2$ rule in $K\to \pi \pi$ decay from the Standard Model

Ryan Abbott, Thomas Blum, Peter A. Boyle +12

We present a lattice QCD calculation of the $\Delta I=1/2$, $K\to \pi \pi$ decay amplitude $A_0$ and ${\epsilon }^{\prime }$, the measure of direct CP-violation in $K\to \pi \pi$ decay, improving our 2015 ca…