THE LARGE MOMENTUM TRANSFER BEHAVIOUR OF MESON-PHOTON TRANSITION FORM FACTORS
P. Kroll
Abstract
It is reported on predictions for the π-γ 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, x1x2, and disfavor distribution amplitudes which are strongly concentrated in the end-point regions. Applications of that approach to the η-γ and η-γ transition form factors are discussed as well.
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