# Europhysics Conference on High-Energy Physics 2011

20-27 July 2011
Alpes Congrès - Alpexpo
Europe/Paris timezone

## Searches with top quarks at D0

21 Jul 2011, 14:45
15m
Dauphine (Alpes Congrès - Alpexpo)

### Dauphine

#### Alpes Congrès - Alpexpo

Parallel session talk

### Speaker

Prof. Dhiman Chakraborty (Northern Illinois University)

### Description

We present two searches involving final states with top quarks or with topologies similar to those observed in top quark decays. The first is a search for the pair production of a fourth generation $t'$ quark and its antiparticle, followed by their decay to a W boson and a jet, based on an integrated luminosity of 5.3 fb$^{-1}$ of $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV. The second is a search for the production of a heavy gauge boson $W'$, that decays to third generation quarks. In both cases we set 95\% C.L.~upper limits on the production cross sections and translate these into limits on the mass of the fourth generation quarks oir of the $W'$ boson in a variety of models.

### Primary author

Dr Chiara Mariotti (INFN Torino)

 Slides