Precise analysis of pion-pion scattering data from Roy equations and forward dispersion relations
High Energy Physics - Phenomenology
2008-11-26 v1
Abstract
We review our recent analysis of pion-pion scattering data in terms of Roy equations and Forward Dispersion Relations, and present some preliminary results in terms of a new set of once-subtracted coupled equations for partial waves. The first analysis consists of independent fits to the different pion-pion channels that satisfies rather well the dispersive representation. In the second analysis we constrain the fit with the dispersion relations. The latter provides a very precise and model independent description of data using just analyticity, causality and crossing.
Cite
@article{arxiv.0804.2632,
title = {Precise analysis of pion-pion scattering data from Roy equations and forward dispersion relations},
author = {J. R. Pelaez and R. Garcia-Martin and R. Kaminski and F. J. Yndurain},
journal= {arXiv preprint arXiv:0804.2632},
year = {2008}
}
Comments
6 pages, two figures. To appear in the proceedings of the Workshop on Scalar Mesons and Related Topics, Lisbon, Portugal, 11-16 Feb 2008