https://doi.org/10.1140/epjc/s10052-015-3495-5
Regular Article - Theoretical Physics
Anomalous decay and scattering processes of the 
meson
1
Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115, Bonn, Germany
2
Bethe Center for Theoretical Physics, Universität Bonn, 53115, Bonn, Germany
* e-mail: kubis@hiskp.uni-bonn.de
Received:
13
April
2015
Accepted:
1
June
2015
Published online:
25
June
2015
We amend a recent dispersive analysis of the anomalous decay process 
by the effects of the 
tensor meson, the lowest-lying resonance that can contribute in the 
system. While the net effects on the measured decay spectrum are small, they may be more pronounced for the analogous 
decay. There are nonnegligible consequences for the transition form factor, which is an important quantity for the hadronic light-by-light scattering contribution to the muon’s anomalous magnetic moment. We predict total and differential cross sections, as well as a marked forward–backward asymmetry, for the crossed process 
, which could be measured in Primakoff reactions in the future.
© The Author(s), 2015
