461 research outputs found
General Analysis of Single Top Production and W Helicity in Top Decay
We provide a framework for the analysis of the W boson helicity in the decay
of the top quark that is based on a general effective tbW coupling. Four
independent coupling coefficients can be uniquely determined by the fractions
of longitudinal and transverse W boson polarizations as well as the single top
production rates for the t-channel and the s-channel processes. The knowledge
of these coefficients can be used to discriminate models of electroweak
symmetry breaking.Comment: Typo on Eqs. 5 and 6 correcte
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