We review the phenomenology of electroweak bosons produced in hadron–hadron collisions. In particular, we discuss the transverse momentum distribution of lepton pairs with invariant mass close to the Z peak. We describe the theoretical calculation for the magnitude of the transverse momentum QT and its comparison to Tevatron and LHC data. We also discuss the related variable ϕ*, describing its experimental advantages as well as its relation to the standard QT variable. Finally, we compare resummed predictions for ϕ* to data.
A novel technique for studying the Z boson transverse momentum distribution at hadron colliders