Spin effects in the fragmentation of a transversely polarized quark
High Energy Physics - Phenomenology
2009-10-31 v2
Abstract
An azimuthal dependence of pions produced in polarized Deep Inelastic Scattering, gamma^* - p(transv. polarized) -> pion + X, has been recently observed and might be related to the so-called Collins effect. We discuss in details, for a general spin configuration of the nucleon, the kinematics of the process and methods of extracting information on the fragmentation properties of a polarized quark. Assuming that the observed azimuthal dependence is indeed due to Collins effect, we derive a lower bound estimate for the size of the quark analysing power, which turns out to be large.
Keywords
Cite
@article{arxiv.hep-ph/0002120,
title = {Spin effects in the fragmentation of a transversely polarized quark},
author = {M. Anselmino and F. Murgia},
journal= {arXiv preprint arXiv:hep-ph/0002120},
year = {2009}
}
Comments
18+1 pages, LaTeX, 5 eps figures, uses epsfig.sty; v2: Some technical problems in dimensions of Figs. 2 and 3 removed