Institution: | aDepartment of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA bPhysics Department, Brookhaven National Laboratory, Upton, NY 11973, USA cRIKEN BNL Research Center, Building 510A, Brookhaven National Laboratory, Upton, NY 11973, USA |
Abstract: | Using the collinear QCD factorization approach, we study the single-transverse-spin dependent cross section Δσ(S ) for the hadronic production of two jets of momenta P1=P+q/2 and P2=−P+q/2. We consider the kinematic region where the transverse components of the momentum vectors satisfy P![perpendicular perpendicular](http://www.sciencedirect.com/scidirimg/entities/22a5.gif) q![perpendicular perpendicular](http://www.sciencedirect.com/scidirimg/entities/22a5.gif) ΛQCD. For the case of initial-state gluon radiation, we show that at the leading power in q /P and at the lowest non-trivial perturbative order, the dependence of Δσ(S ) on q decouples from that on P , so that the cross section can be factorized into a hard part that is a function only of the single scale P , and into perturbatively generated transverse-momentum dependent (TMD) parton distributions with transverse momenta . |