Electroweak Corrections to the Top Quark Decay

Abstract

We have calculated the one-loop electroweak corrections to the decay t-> bW+, including the counterterm for the CKM matrix elements V(tb). Previous calculations used an incorrect delta V(tb) that led to a gauge dependent amplitude. However, since the contribution stemming from delta V(tb) is small, those calculations only underestimate the width by roughly one part in 10^5.

7 pages, 2 figures

References in corpus (4)

• Second Order QCD Corrections to $\Gamma (t\to Wb)$
• Gauge-Independent W-Boson Partial Decay Widths
• Renormalization of the Cabibbo-Kobayashi-Maskawa Matrix
• Exact O(g^2 alpha_s) top decay width from general massive two-loop integrals

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