Extracting resonance parameters from lattice data

Abstract

Monte Carlo simulations of the 4d O(4) model in the broken phase are performed to determine the parameters of a resonance. The standard method for extracting them on the lattice is through Lüscher's formula; recently a new method, based on the probability distribution concept, has been proposed. We study the application of these methods and compare them with Monte Carlo data.

Comments: 14 pages, 16 figures, The XXVIII International Symposium on Lattice Field Theory, Lattice2010