Speaker
Xu Feng
(Peking University)
Description
We present a lattice procedure to calculate the leptonic pion decay width with only exponentially-suppressed finite-volume errors using the infinite-volume reconstruction method. Three technical points: 1) the inclusion of pion wave function renormalization factor, 2) the cancellation of infared divergence and 3) the connection between Euclidean-space correlation function and the relevant matrix element in Minkowski space will be discussed.
Authors
Norman Christ
(Columbia University)
Xu Feng
(Peking University)
Luchang Jin
Chris Sachrajda
(University of Southampton)