1997/10/29 by D. Boer, Boer, D., P. J. Mulders +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9710525
10 pages, Latex, 4 Postscript figure, uses epsfig.sty. Invited talk presented at the workshop 'Deep inelastic scattering off polarized targets: theory meets experiment', DESY-Zeuthen, September 1-5, 1997
arxiv created 1997/10/29 · arxiv updated 2009/11/30
We discuss single transverse spin asymmetries in the Drell-Yan process originating from so-called gluonic poles in twist-three hadronic matrix elements, as first considered by Qiu and Sterman. Even though time-reversal invariance is not broken, the effects of such poles cannot be distinguished from those of time-reversal odd distribution functions. We show the connection between gluonic poles and large distance gluon fields, in particular we focus on boundary conditions. We identify the possible single spin asymmetries in the Drell-Yan process.