Two-loop QCD corrections to top quark decay

Details Two-loop QCD corrections to top quark decay Two-loop QCD corrections to top quark decay

2004-04-27

arxiv.org/abs/hep-ph/0404249v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, to appear in the proceedings of Lake Louise Winter Institute 2004, Lake Louise, Alberta, Canada, 15-21 Feb 2004

Scientific paper

We present a determination of a new class of Feynman diagrams relevant for
second-order QCD corrections to the top quark decay t -> b W. Modern computing
techniques allow us to perform a reduction of the original loop integrals to
master integrals. We obtain the analytical value of the top decay rate as an
expansion around the limit of massless b and W.

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