Wandzura-Wilczek approximation from generalized rotational invariance


We present the alternative way of derivation of the Wandzura-Wilczek relations between the kinematical twist-3 and twist-2 functions, parameterizing hadronic matrix element in two-photon processes γπ → γπ and γγ → ππ. The new equations, providing the independence of the physical cross-sections on the choice of the light-cone direction, are suggested and… (More)


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@inproceedings{Anikin2001WandzuraWilczekAF, title={Wandzura-Wilczek approximation from generalized rotational invariance}, author={Ivan V. Anikin}, year={2001} }