Perturbative contribution to the sin(phi) asymmetry in inclusive pi^{+} electroproduction
arXiv:hep-ph/0010063 · doi:10.1016/S0920-5632(01)01122-7
Abstract
We consider the sin(phi) single target-spin asymmetry in deep-inelastic pi^{+} inclusive electroproduction off a longitudinally polarized target. We show that at larger transverse momentum of the outgoing hadron the evaluated asymmetry decreases if one takes into account the first order alpha_S perturbative contribution to the cross section, integrated over the azimuthal angle. This leads to good agreement with recent HERMES data.
4 pages with one figure, LaTeX, typos corrected. Contribution to the Proceedings of the QCD'00 Euroconference, Montpellier, 6-13th July 2000, to appear in the Nucl. Phys. B (Proc. Suppl.)