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T: Fachverband Teilchenphysik

T 13: Elektroschwache Physik (Theorie)

T 13.3: Vortrag

Montag, 28. März 2011, 17:15–17:30, 30.23: 6-1

Central Jet Veto for processes with W and Z bosons — •Matthias Kerner and Dieter Zeppenfeld — IThP, Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany

Vector boson fusion processes will be used to probe the mechanism of electroweak symmetry breaking at the LHC. Large backgrounds will arise from QCD induced processes, where instead of electroweak bosons a gluon is exchanged between the initial state partons. Because of the additional t-channel color exchange, angular distributions of additional jets, beyond the two tagging jets, are expected to differ in the QCD backgrounds.

We have implemented the leading order gluon induced process pp → WZjjj, with leptonic decay of the weak bosons, into a flexible parton level Monte Carlo program, VBFNLO. In this talk we will present the results of these calculations and quantify to what extent a central jet veto can be used to reduce QCD backgrounds to weak boson scattering.