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 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)

Presentation Materials