Abstract
By applying the collinear expansion to the semi-inclusive hadron production process at high energies, we construct a theoretical framework where leading and higher twist contributions at the leading perturbative QCD can be calculated systematically. With this framework, we calculate the contributions up to twist-3 for spin-0, spin-, and spin-1 hadrons, respectively. We present the results for the hadronic tensors, the differential cross sections, the azimuthal asymmetries, and the polarizations of the hadrons.
- Received 3 November 2014
DOI:https://doi.org/10.1103/PhysRevD.91.034015
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