Lattice determination of the $K\to (\pi \pi {)}_{I=2}$ Decay Amplitude $A_2$

T. Blum, P. A. Boyle, N. H. Christ +13

We describe the computation of the amplitude A_2 for a kaon to decay into two pions with isospin I=2. The results presented in the letter Phys.Rev.Lett. 108 (2012) 141601 from an a…