# DPF 2011

8-13 August 2011
Rhode Island Convention Center
US/Eastern timezone

## Higgs Production through Top-prime decays at the LHC

11 Aug 2011, 11:30
20m
Plenary Ballroom (Rhode Island Convention Center)

### Plenary Ballroom

#### Rhode Island Convention Center

Parallel contribution Beyond the Standard Model

### Speaker

Ms Saptaparna Bhattacharya (Brown University)

### Description

We explore LHC signatures of vectorlike quarks, which are hypothetical fermions whose left- and right-handed components have the same electroweak quantum numbers. We consider interactions of such a quark, top-prime, with the top quark via a Yukawa coupling and with a bottom quark through a $W$ boson. We look at Higgs production through the decay of the top-prime in a top-prime pair production channel through QCD at the LHC with $\sqrt{s} =$ 7 TeV. Such a process depends only on the top-prime mass. In this channel, we consider semi-leptonic $W$-boson decays. This choice is dictated by the reduction of QCD background and a higher cross section than the corresponding much cleaner di-leptonic channel. We suggest a background discrimination strategy involving $b$-tagging and a lepton in the final state. The possibility of the top-prime decaying into a light (120 GeV/$c^2$) and a relatively heavier Higgs (150 GeV/$c^2$) will be explored. The mixing angle between the top and the top-prime, which is a parameter of the model, has been chosen judiciously so that the analysis remains as model independent as possible.

### Primary authors

Prof. Bogdan Dobrescu (Theoretical Physics Department, Fermi National Accelerator Laboratory) Prof. Meenakshi Narain (Brown University) Ms Saptaparna Bhattacharya (Brown University)

 Slides