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

Godbole, Rohini M. ; Rindani, Saurabh D. ; Singh, Ritesh K. (2006) Lepton distribution as a probe of new physics in production and decay of the t quark and its polarization Journal of High Energy Physics, 2006 (12). 021_1-021_24. ISSN 1126-6708

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Official URL: http://iopscience.iop.org/1126-6708/2006/12/021

Related URL: http://dx.doi.org/10.1088/1126-6708/2006/12/021

Abstract

We investigate the possibility of studying new physics in various processes of t-quark production using kinematical distributions of the secondary lepton coming from the decay of t quarks. We show that the angular distribution of the secondary lepton is insensitive to 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 the lepton 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 the decay lepton are demonstrated for top-pair production process at a γγ collider mediated by a heavy Higgs boson.

Item Type:Article
Source:Copyright of this article belongs to Institute of Physics.
Keywords:Top; Polarization; Anomalous Top Coupling
ID Code:43595
Deposited On:14 Jun 2011 09:57
Last Modified:18 May 2016 00:31

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