Higher twist nucleon distribution amplitudes in
Wandzura-Wilczek approximation
I.V. Anikin (JINR, Dubna)
We discuss the higher twist (four and five) nucleon distribution
amplitudes within the Wandzura-Wilczek approximation.
The proposed method is based on an analysis of the conformal expansion
of nonlocal operators in the spinor/twistor formalism.