Lattice QCD calculation of ${\pi }^0\to e^{+}{e}^{-}$ decay

Norman Christ, Xu Feng, Luchang Jin +2

We extend the application of lattice QCD to the two-photon-mediated, order ${\alpha }^2$ rare decay ${\pi }^0\to e^{+}{e}^{-}$. By combining Minkowski- and Euclidean-space methods we are abl…