Factorization theorem, gluon poles and new contributions in semi-inclusive processes

Abstract

We discuss the role of gluon poles and the gauge invariance for the hadron tensors of Drell-Yan and direct photon production processes with the transversely polarized hadron.

Comments: 6 pages, 2 figures. Talk given at 6th International Conference on Physics Opportunities at Electron-Ion Collider, POETIC VI, Palaiseau, France, 7-11 September 2015. arXiv admin note: substantial text overlap with arXiv:1512.02501