omega --> pi0 gamma* and phi --> pi0 gamma* Transition form factors in dispersion theory
High Energy Physics - Phenomenology
2015-03-20 v2 High Energy Physics - Experiment
Nuclear Experiment
Abstract
We calculate the omega --> pi0 gamma* and phi --> pi0 gamma* electromagnetic transition form factors based on dispersion theory, relying solely on a previous dispersive analysis of the corresponding three-pion decays and the pion vector form factor. We compare our findings to recent measurements of the omega --> pi0 mu+ mu- decay spectrum by the NA60 collaboration, and strongly encourage experimental investigation of the Okubo-Zweig-Iizuka-forbidden phi --> pi0 l+ l- decays in order to understand the strong deviations from vector-meson dominance found in these transition form factors.
Keywords
Cite
@article{arxiv.1206.3098,
title = {omega --> pi0 gamma* and phi --> pi0 gamma* Transition form factors in dispersion theory},
author = {Sebastian P. Schneider and Bastian Kubis and Franz Niecknig},
journal= {arXiv preprint arXiv:1206.3098},
year = {2015}
}
Comments
11 pages, 8 figures; references updated, version published in Phys. Rev. D