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arXiv · 1206.3098

omega --> pi0 gamma* and phi --> pi0 gamma* Transition form factors in dispersion theory

Sebastian P. Schneider·Bastian Kubis·Franz Niecknig
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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.

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Sebastian P. Schneider, Bastian Kubis, Franz Niecknig. 2012-09-21. omega --> pi0 gamma* and phi --> pi0 gamma* Transition form factors in dispersion theory. https://doi.org/10.1103/physrevd.86.054013

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