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Electroweak and finite width corrections to top quark decays into transverse and longitudinal W -bosons

H. S. Do, S. Groote, J. G. Körner, M. C. Mauser

hep-pharXiv:hep-ph/0209185

Abstract

We calculate the electroweak and finite width corrections to the decay of an unpolarized top quark into a bottom quark and a W -gauge boson where the helicities of the W are specified as longitudinal, transverse-plus and transverse-minus. Together with the O(αs) corrections these corrections may become relevant for the determination of the mass of the top quark through angular decay measurements.

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