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Jet Vetoes and Azimuthal Decorrelation at ATLAS

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Searches for new physics at the Large Hadron Collider typically rely on perturbative QCD calculations to correctly describe the signal and background kinematics. These searches, however, tend to apply stringent analysis cuts and the perturbative QCD calculations can be pushed into regions of phase space in which they are no longer viable. Where cuts are imposed on additional quark or gluon radiation from the process of interest, fixed order calculations will typically break down as higher order corrections to the cross-section become very large. Measurements sensitive to this additional QCD radiation are therefore important in helping future theoretical tools to provide better calculations, with smaller uncertainties.

This talk is part of the Cavendish HEP Seminars series.

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