pi-pi scattering amplitudes constrained by Roy's equations
High Energy Physics - Phenomenology
2007-05-23 v1
Abstract
The scalar-isoscalar, scalar-isotensor and vector-isovector pi-pi amplitudes have been fitted simultaneously to experimental data and to to Roy's equations. Resulting pi-pi phase shifts up to 1600 MeV and near threshold observables have been analyzed. Only the amplitudes fitted to the "down-flat" set of phase shifts in scalar-isoscalar wave fulfill crossing symmetry conditions and can be regarded as physical.
Cite
@article{arxiv.hep-ph/0510218,
title = {pi-pi scattering amplitudes constrained by Roy's equations},
author = {R. Kaminski and L. Lesniak and B. Loiseau},
journal= {arXiv preprint arXiv:hep-ph/0510218},
year = {2007}
}
Comments
4 pages, talk presented at 12th International QCD Conference (QCD05) 4-9th July 2005 Montpellier (France), to appear in Nucl. Phys. B (Proc. Suppl.)