8–13 Mar 2006
Indian Institute of Science
Europe/Zurich timezone

Lepton distribution as a probe of new physics in production and decay of $t$-quark and its polarization

11 Mar 2006, 11:20
20m
AS (ASTRA) (Indian Institute of Science)

AS (ASTRA)

Indian Institute of Science

C. V. Raman Road, Bangalore 560012, India

Speaker

Mr Ritesh Singh (LPT Orsay, France)

Description

We investigate the possibilities of studying possible new physics in various processes of t-quark production using the kinematical distributions of the secondary lepton coming from decay of t-quarks. We show that the angular distributions of secondary lepton are insensitive the anomalous tbW vertex and hence is a pure probe of new physics in a generic process of t-quark production. The energy distribution of these leptons is distinctly affected by anomalous tbW couplings and can be used to analyze them independent of the production process of t-quarks. The effects of $t$-polarization on the distributions of decay leptons are demonstrated for top-pair production process at a gamma-gamma-collider mediated by a heavy Higgs boson.

Primary author

Mr Ritesh Singh (LPT Orsay, France)

Presentation materials