Quark correlations and single-spin asymmetries
arXiv:hep-ph/0408009 · doi:10.1016/j.nuclphysbps.2004.12.014
Abstract
We illustrate, in a semi-classical picture, how the Wilson line phase factor in gauge invariantly defined unintegrated parton density can lead to a nonzero single-spin asymmetry (Sivers effect).
6 pages, invited talk given at "QCD Down Under 2004", and "Continuous Advances in QCD 2004"