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arXiv · 1410.4314

Leading and higher twist contributions in semi-inclusive e+e- annihilation at high energies

Shu-Yi Wei·Kai-bao Chen·Yu-kun Song·Zuo-tang Liang
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Abstract

By applying the collinear expansion to the semi-inclusive hadron production process $e^++e^-\to h+\bar q(jet)+X$ 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.

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Shu-Yi Wei, Kai-bao Chen, Yu-kun Song, Zuo-tang Liang. 2014-11-01. Leading and higher twist contributions in semi-inclusive e+e- annihilation at high energies. https://doi.org/10.1103/physrevd.91.034015

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