https://doi.org/10.1140/epja/i2010-10961-7
Letter
Primakoff effect in 
-photoproduction off protons
1
Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) und Bethe Center for Theoretical Physics, Universität Bonn, D-53115, Bonn, Germany
2
Excited Baryon Analysis Center (EBAC), Thomas Jefferson National Accelerator Facility, 23606, Newport News, VA, USA
3
Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425, Jülich, Germany
4
Institute for Advanced Simulation, Forschungszentrum Jülich, D-52425, Jülich, Germany
* e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
6
January
2010
Revised:
4
March
2010
Accepted:
5
March
2010
Published online:
26
March
2010
Abstract
We analyse data on forward -meson photoproduction off a proton target and extract the
decay width utilizing the Primakoff effect. The hadronic amplitude that enters into our analysis is strongly constrained because it is fixed from a global fit to available
p
p
data for differential cross-sections and polarizations. We compare our results with present information on the two-photon -decay from the literature. We provide predictions for future PrimEx experiments at Jefferson Laboratory in order to motivate further studies.
© SIF, Springer-Verlag Berlin Heidelberg, 2010
