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

Godbole, Rohini M and Rindani, Saurabh D and Singh, Ritesh K (2006) Lepton distribution as a probe of new physics in production and decay of the t quark and its polarization. In: Journal of High Energy Physics, 2006 (12). pp. 1-24.

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## 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 $\gamma \gamma$ collider mediated by a heavy Higgs boson.

Item Type: Journal Article Copyright of this article belongs to Institute of Physics. Heavy Quark Physics;Spin and Polarization Effects;Beyond Standard Model Division of Physical & Mathematical Sciences > Centre for High Energy Physics 26 Jun 2007 19 Sep 2010 04:36 http://eprints.iisc.ernet.in/id/eprint/10359