Single spin asymmetry for $p^{\uparrow}p \to \pi X$ in perturbative QCD
Abstract
Within the QCD-improved parton model and assuming the factorization theorem to hold in the helicity basis and for higher twist contributions, we show how non zero single spin asymmetries in hadron-hadron high energy and moderately large inclusive processes can be obtained, even in massless perturbative QCD, provided the quark intrinsic motion is taken into account. A simple model is constructed which reproduces the main features of the data on the single spin asymmetry observed in inclusive pion production in collisions.
Cite
@article{arxiv.hep-ph/9503290,
title = {Single spin asymmetry for $p^{\uparrow}p \to \pi X$ in perturbative QCD},
author = {M. Anselmino and M. Boglione and F. Murgia},
journal= {arXiv preprint arXiv:hep-ph/9503290},
year = {2009}
}
Comments
11 pages + 1 figure, plain LaTeX, figure appended as uuencoded, compressed postscript file. Revised version, to be published in Phys. Lett. B; extensive changes in Sections 1 and 2, new References added, results and conclusions essentially unchanged