\eta and \eta' transition form factors from rational approximants
High Energy Physics - Phenomenology
2015-06-16 v3
Abstract
The \eta and \eta' transition form factors in the space-like region are analyzed at low and intermediate energies in a model-independent way through the use of rational approximants. The slope and curvature parameters of the form factors as well as their values at zero and infinity are extracted from experimental data. The impact of these results on the mixing parameters of the \eta-\eta' system and the pseudoscalar-exchange contributions to the hadronic light-by-light scattering part of the anomalous magnetic moment are also discussed.
Keywords
Cite
@article{arxiv.1307.2061,
title = {\eta and \eta' transition form factors from rational approximants},
author = {R. Escribano and P. Masjuan and P. Sanchez-Puertas},
journal= {arXiv preprint arXiv:1307.2061},
year = {2015}
}
Comments
15 pages, 11 figures. v2: references added and minor typos corrected. v3: more references added and a new figure comparing different slope determinations is included. Matches the published version in PRD