The Top Width - Theoretical update
M. Jeżabek, J. H. Kühn
Abstract
A critical assessment of the available calculations of the top quark width is presented. QCD corrections, the finite mass of the b quark and the effect of the W width are included as well as the electroweak corrections. The relative importance of these corrections is demonstrated for the realistic range of top masses. For the QCD corrected decay rate we use the formulae from JK1 and include the electroweak correction taken from DS. Our results differ from those available in the literature because all the later calculations ignored the effect of W width discussed earlier in JK1~. This leads to an effect comparable in size to the electroweak correction.
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