The form factor of the transition gamma gamma * pi^0

Details The form factor of the transition gamma gamma * pi^0 The form factor of the transition gamma gamma * pi^0

2000-05-02

arxiv.org/abs/hep-ph/0005017v1

Phys.Rev. D63 (2001) 054028

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 1 eps figure

Scientific paper

10.1103/PhysRevD.63.054028

A simple method is used to extrapolate the form factor for the process gamma* gamma *--->pi^0 when two virtual photons produce a pi ^0 from the region of large spacelike photon virtualities to the experimentally accessible case when one of the photons is real. The method is also applied to the study of the axial anomaly and omega -rho -pi coupling and to the pion charge and charge radius. The results compare favourably with the experimental measurements.

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