Dominant Contribution in Pion Production Single-Spin Asymmetries

Abstract

Working with a completely collinear twist-3 factorized cross-section formula, we identify two largely dominant partonic sub-processes, which contribute to the single-spin asymmetries in semi-inclusive pion production, in the region of large pT and medium-large xF.

Comments: 4 pages, 2 figures, talk presented by Ramilli at the XII Advanced Research Workshop on High Energy Spin Physics (DSPIN-07), Dubna, 3-7 Sept. 2007