# Bonn 2010 – wissenschaftliches Programm

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# T: Fachverband Teilchenphysik

## T 14: Elektroschwache Physik (Theorie)

### T 14.4: Vortrag

### Freitag, 19. März 2010, 14:45–15:00, HG XVI

**Anomalous Quartic Couplings in Triple Weak Boson Production at the LHC** — •Bastian Feigl and Dieter Zeppenfeld — Institut für Theoretische Physik, Karlsruher Institut für Technologie, Deutschland

A modification of the four vector boson vertex is a possible candidate for BSM physics. Within a linear realization of the electroweak symmetry breaking, anomalous couplings arising from dimension-8-operators can be used to parameterize effects in the quartic coupling, without altering other vertices at tree level. A production process that is sensitive to these quartic couplings is triple vector boson production.

Feynman rules for a set of dimension-8-operators have been implemented into the Monte Carlo program VBFNLO in the triple vector boson production processes. VBFNLO can perform cross section calculations for these processes with leptonic decay in NLO QCD.

Possible deviations from the standard model four-vertex were studied with the VBFNLO package. Changes in differential cross sections and sensitivity limits for these operators at the LHC were established within constraints from unitarity restrictions.