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Wuppertal 2015 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 17: Elektroschwache Physik (Theorie)

T 17.2: Vortrag

Montag, 9. März 2015, 14:15–14:30, K.11.20 (K5)

Unitarisation of Anomalous Couplings in Vector Boson ScatteringDieter Zeppenfeld, Michael Rauch, and •Maximilian Löschner — Institut für Theoretische Physik, KIT

The Standard Model predicts the existence of quartic gauge boson couplings. The experimental test of their size has only begun recently. A model-independent approach to describe new physics effects in these couplings is the introduction of dimension-8 operators in an effective field theory framework.

In this talk we will show that the unitarisation of the resulting anomalous couplings is a necessary condition when comparing theoretical predictions to experimental data. To this effect we have implemented the so called K-matrix unitarisation scheme in the parton-level Monte Carlo event generator VBFNLO and we will present results obtained in this scheme. Moreover a comparison between this and other approaches for unitarisation like form factors will be discussed.

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