By applying the collinear expansion to the semi-inclusive hadron production process e++e−→h+qˉ(jet)+X at high energies, we construct a theoretical framework where the 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-1/2 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.
@article{arxiv.1410.4314,
title = {Leading and higher twist contributions in semi-inclusive e+e- annihilation at high energies},
author = {Shu-Yi Wei and Kai-bao Chen and Yu-kun Song and Zuo-tang Liang},
journal= {arXiv preprint arXiv:1410.4314},
year = {2015}
}