Spectral density in resonance region and analytic confinement
High Energy Physics - Phenomenology
2009-11-10 v2
Abstract
We study the role of finite widths of resonances in a nonlocal version of the Wick-Cutkosky model. The spectrum of bound states is known analytically in this model and forms linear Regge tragectories. We compute the widths of resonances, calculate the spectral density in an extension of the Breit-Wigner {\it ansatz} and discuss a mechanism for the damping of unphysical exponential growth of observables at high energy due to finite widths of resonances.
Keywords
Cite
@article{arxiv.hep-ph/0406069,
title = {Spectral density in resonance region and analytic confinement},
author = {Alex C. Kalloniatis and Sergei N. Nedelko and Lorenz von Smekal},
journal= {arXiv preprint arXiv:hep-ph/0406069},
year = {2009}
}
Comments
13 pages, RevTeX, 6 figures. Revised version with typographical corrections and additional comments in conclusions