Identifying the Universal part of TMDs

Abstract

We attempt to identify a path layout in the definition of transverse-momentum-dependent T-odd parton distribution functions (TMD)s which combines features of both, initial- and final-state interactions, so that it remains universal despite the fact that the Wilson lines entering such TMDs change their orientation. The generic structure of the quark correlator for this path layout is calculated.

Comments: Proceedings for Light Cone 2015, 5 pages. Current version accepted for publication in Few-Body Systems