What does `rho-exchange' in piN scattering mean?
Nuclear Theory
2009-10-31 v1
Abstract
We present an alternative method for calculating amplitudes for correlated pi pi exchange in the ``sigma'' and rho channel in piN scattering. Starting from a fixed mass meson exchange potential, we introduce the width of the exchanged particles by integrating over a mass spectral function. The spectral functions are constructed from the pseudoempirical N\bar{N} -> pi pi data. Using this approach we develop a prescription for resolving ambiguities of the correlated pi pi exchange in the rho channel that occur when different dispersion theoretical formulations of rho exchange are used to construct piN potentials.
Keywords
Cite
@article{arxiv.nucl-th/9906090,
title = {What does `rho-exchange' in piN scattering mean?},
author = {O. Krehl and C. Hanhart and S. Krewald and J. Speth},
journal= {arXiv preprint arXiv:nucl-th/9906090},
year = {2009}
}
Comments
17 pages, 5 figures, uses revtex and epsfig