Speaker
Eric Jansen
(University College London (UK))
Description
The production of jets in association with a W or Z boson in proton-proton collisions at 7 TeV study multileg QCD diagrams. The cross section, differential in several kinematics variables,has been measured up to high jet multiplicities and compared to new higher-order QCD calculations. The ratio of (Z + a single jet)/(W + a single jet) can provide a very precise test of QCD and has also been measured. Overall, the cross sections demonstrate the need for the
inclusion of higher-multiplicity matrix elements in the calculations, even in cases where a parton shower simulation is present.
