THE LARGE MOMENTUM TRANSFER BEHAVIOUR OF MESON-PHOTON TRANSITION FORM FACTORS

Details THE LARGE MOMENTUM TRANSFER BEHAVIOUR OF MESON-PHOTON TRANSITION FORM FACTORS THE LARGE MOMENTUM TRANSFER BEHAVIOUR OF MESON-PHOTON TRANSITION FORM FACTORS

1995-04-26

arxiv.org/abs/hep-ph/9504394v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 3 figures, included in one compressed, uuencoded PS-file

Scientific paper

It is reported on predictions for the $\pi$-$\gamma$ transition form factor obtained within a perturbative approach which includes transverse momentum effects and Sudakov corrections. The results clearly favor distribution amplitudes close to the asymptotic form, $\sim x_1x_2$, and disfavor distribution amplitudes which are strongly concentrated in the end-point regions. Applications of that approach to the $\eta$-$\gamma$ and $\eta^\prime$-$\gamma$ transition form factors are discussed as well.

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