2000/03/28 by Laurent Lellouch, Martin Lüscher · 2 citations
Physics and Astronomy · #hep-lat #hep-ph
paper · pdf · doi:10.1007/s002200100410
published as Commun.Math.Phys. 219 (2001) 31-44 · Plain TeX source, 19 pages, figures included
arxiv created 2000/03/28 · arxiv updated 2009/11/30
The two-body decay rate of a weakly decaying particle (such as the kaon) is shown to be proportional to the square of a well-defined transition matrix element in finite volume. Contrary to the physical amplitude, the latter can be extracted from finite-volume correlation functions in euclidean space without analytic continuation. The K -> pi pi transitions and other non-leptonic decays thus become accessible to established numerical techniques in lattice QCD.