Mixed QCD$\otimes$QED corrections to exclusive Drell Yan production using the $q_T$-subtraction method

Abstract

In this work we extend the $q_T$-subtraction formalism, originally developed for QCD corrections, to the case of mixed QCD$\otimes$QED corrections, and apply it to the fully exclusive calculation of the $\mathcal{O}({\alpha }_s\alpha )$ contribution to the production of an off-shell $Z$ boson in hadronic collisions. We present explicit results for the subtraction term and the hard factor, therefore providing all the ingredients needed for the application of the formalism up to $\mathcal{O}({\alpha }_s\alpha )$. To study the phenomenological impact we consider the decay of the off-shell $Z$ boson into a pair of neutrinos, and present kinematical distributions for the final-state leptons at LHC energies.

Comments: 20 pages, 5 figures