# IOP 2014 Joint HEPP & APP Group Meeting

7-9 April 2014
Royal Holloway, University of London
Europe/London timezone
Institute of Physics 2014 Joint High Energy Particle Physics and Astro Particle Physics Groups Annual Meeting

## Observation of electroweak Zjj production

8 Apr 2014, 13:30
15m
Room A (Windsor Building)

### Room A

#### Windsor Building

contributed talk The Energy Frontier Programme

### Speaker

Christian Gutschow (University College London (UK))

### Description

Events with jets produced in association with a $Z$ boson in proton-proton collisions can be used to study distributions sensitive to the vector boson fusion (VBF) process at CERN's Large Hadron Collider. This process is interesting to study because of its similarity to the VBF production of a Higgs boson as well as its sensitivity to new physics via the WWZ triple gauge coupling. Evidence for electroweak $Zjj$ production beyond the $5\sigma$ level is presented using data collected by the ATLAS experiment in 2012. This constitutes the first observation of a process involving a VBF diagram. The detector-corrected cross sections measured in two fiducial regions are in excellent agreement with the Standard Model expectations.

### Primary author

Christian Gutschow (University College London (UK))

 Slides