Speaker
Dr
Sebastian P. Schneider
(HISKP Uni Bonn)
Description
Dispersion theoretical analyses of transition form factors are stepping stones to a model-independent determination of the light-by-light scattering contribution to $(g-2)_\mu$. We have performed such an analysis on the conversion decays of the lightest isoscalar vector
mesons, $\omega/\phi\to\pi^0\ell^+\ell^-$. For that we resort to a dispersive analysis of the $V\to3\pi$ partial-wave amplitude
and the precisely constrained pion vector form factor as main ingredients. Extending the framework for the vector decays to incorporate the intermediate $e+e-\to3\pi$ we obtain a description of the $\pi^0$ transition form factor measured in $e^+e^-\to\pi^0\gamma$.
Primary author
Dr
Sebastian P. Schneider
(HISKP Uni Bonn)
