Extraction of the resonance parameters at finite times
High Energy Physics - Lattice
2011-02-01 v1 High Energy Physics - Phenomenology
Abstract
In this paper we propose a model-independent method to extract the resonance parameters on the lattice directly from the Euclidean 2-point correlation functions of the field operators at finite times. The method is tested in case of the two-point function of the Delta-resonance, calculated at one loop in Small Scale Expansion. Further, the method is applied to a 1+1-dimensional model with two coupled Ising spins and the results are compared with earlier ones obtained by using Luescher's approach.
Keywords
Cite
@article{arxiv.1007.0860,
title = {Extraction of the resonance parameters at finite times},
author = {Ulf-G. Meißner and Kathryn Polejaeva and Akaki Rusetsky},
journal= {arXiv preprint arXiv:1007.0860},
year = {2011}
}
Comments
20 pages, 6 figures