Probing TMDs through azimuthal distributions of pions inside a jet in hadronic collisions

Abstract

The azimuthal distributions around the jet axis of leading pions produced in the jet fragmentation process in pp collisions are studied within the framework of the so-called generalized parton model. The observable leading-twist azimuthal asymmetries are estimated in kinematic configurations presently investigated at RHIC. It is shown how the main contributions coming from the Collins and Sivers effects can be disentangled. In addition, a test of the process dependence of the Sivers function is provided.

Comments: 4 pages, 3 figures, to appear in the proceedings of the 20th International Symposium on Spin Physics (SPIN2012), JINR, Dubna (Russia), 17 - 22 September 2012