Paper
Intrinsic transverse momentum and the polarized Drell-Yan process
Authors
R. D. Tangerman, P. J. Mulders
Abstract
In this paper we study the cross section at leading order in for polarized Drell-Yan scattering at measured lepton-pair transverse momentum . We find that for a hadron with spin the quark content at leading order is described by six distribution functions for each flavor, which depend on both the lightcone momentum fraction , and the quark transverse momentum . These functions are illustrated for a free-quark ensemble. The cross sections for both longitudinal and transverse polarizations are expressed in terms of convolution integrals over the distribution functions.