Twist-4 contributions to semi-inclusive deeply inelastic scatterings with polarized beam and target

Shu-yi Wei, Yu-kun Song, Kai-bao Chen +1

We present for the first time the complete twist-4 result for the semi-inclusive deeply inelastic scattering $e^{-}N\to e^{-}qX$ with polarized electron and proton beams at the tree…