# ICHEP2012

Jul 4 – 11, 2012
Melbourne Convention and Exhibition Centre
Australia/Melbourne timezone
ICHEP2012 - 36th International Conference for High Energy Physics

## Search for anomalous Wtb couplings in ppbar collisions at sqrt(s) = 1.96 TeV (D0)

Jul 6, 2012, 3:15 PM
15m
Room 216 (Melbourne Convention and Exhibition Centre)

### Room 216

#### Melbourne Convention and Exhibition Centre

Melbourne Australia
Parallel Sessions Track 4 - Top Quark Physics

### Speaker

Prof. Kenneth Bloom (University of Nebraska-Lincoln (US))

### Description

We present new direct constraints on a general Wtb interaction using data corresponding to an integrated luminosity of 5.4 fb-1 collected by the D0 detector at the Tevatron ppbar collider. The standard model provides a purely left-handed vector coupling at the Wtb vertex, while the most general, lowest dimension Lagrangian allows right-handed vector and left- or right-handed tensor couplings as well. We obtain precise limits on these anomalous couplings by comparing the data to the expectations from different assumptions on the Wtb coupling using information from electroweak single top quark production. We combine this with results studying the helicity of W bosons from top quark decays in ttbar events.

### Primary author

Prof. Kenneth Bloom (University of Nebraska-Lincoln (US))

 Slides