Spin Dependent Drell Yan and Double Prompt Photon Production to NLO QCD

Abstract

We present the complete $O({\alpha }_s^2)$ radiative corrections to the (non singlet) polarized Drell Yan cross section for the production of a lepton pair with a nonzero $q_T$. The helicity of the incoming states is arbitrary. In the case of double photon, results for the longitudinal asymmetries and on the $p_T$ behavior of the cross section are also given (to $O({\alpha }_{em}^2{\alpha }_s)$) in the central rapidity region of the tagged photon.

Comments: 6 pages, 6 figures, Presented by C. Coriano at the Fifth International meeting DIS 97, Chicago 14-18 April 1997