K \to ÏÏdecay amplitudes from the lattice
arXiv:hep-lat/0210003 · doi:10.1016/S0920-5632(03)01553-6
Abstract
In order to directly compute physical two-pion K-decay amplitudes using lattice methods we must prepare a two-pion state with non-zero relative momentum. Building upon a proposal of Lellouch and Lüscher, we describe a finite-volume method to realize such a state as the lowest energy state of two pions.
3 pages, Lattice 2002(WME)