C. Vogt

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hep-ph2001

gamma* gamma(*) to pi transitions and the pion distribution amplitude

Carsten Vogt

We discuss what can be learned about the shape of the pion distribution amplitude from the form factor for gamma* gamma(*) to pi transitions.

hep-ph2001

The photon-pion transition form factor for virtual photons

M. Diehl, P. Kroll, C. Vogt

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 sha…

hep-ph1999

$γ γ \to π^{+} π^{-}$ in the Modified Perturbative Approach

C. Vogt

We investigate the transverse momentum effects in $γ γ \to π^{+} π^{-}$ at moderately large total center of mass energy $s$ in the modified perturbative approach. The calculation of…

gamma* gamma(*) to pi transitions and the pion distribution amplitude

The photon-pion transition form factor for virtual photons

γγ→π+π− in the Modified Perturbative Approach

$γ γ \to π^{+} π^{-}$ in the Modified Perturbative Approach