Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-05-09
JHEP0612:021,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages, 7 figures, uses axodraw.sty (included), references added. v3 to appear in Journal of High Energy Physics. Incorporat
Scientific paper
10.1088/1126-6708/2006/12/021
We investigate the possibilities of studying new physics in various processes of t-quark production using kinematical distributions of the secondary lepton coming from decay of t quarks. We show that the angular distributions of the secondary lepton are insensitive to the anomalous tbW vertex and hence are pure probes 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.
Godbole Rohini M.
Rindani Saurabh D.
Singh Ritesh K.
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