Hadronic decay width from finite-volume energy spectrum in lattice QCD

Abstract

The standard approach to determine the parameters of a resonance is based on the study of the volume dependence of the energy spectrum. In this work we study a non-linear sigma model coupled to a scalar field in which a resonance emerges. Using an analysis method introduced recently, based on the concept of probability distribution, it is possible to determine the mass and the width of the resonance.

Comments: 5 pages, 3 figures, "The XIII International Conference on Hadron Spectroscopy, Hadron 2009"