The photon-pion transition form factor for virtual photons

Details The photon-pion transition form factor for virtual photons The photon-pion transition form factor for virtual photons

2001-05-31

arxiv.org/abs/hep-ph/0105342v2

eConf C010430 (2001) T21

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 5 figures. Talk delivered by C. Vogt at the workshop "e+ e- Physics at Intermediate Energies", SLAC, April 30 - May 2

Scientific paper

We discuss the photon to meson transition form factor for virtual photons, which can be measured in e+ e- collisions. We demonstrate that this form factor is independent of the shape of the meson distribution amplitude over a wide kinematical range. This leads to a parameter-free prediction of perturbative QCD to leading twist accuracy, which has a status comparable to the famous leading-twist prediction of the cross section ratio R.

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