Finite Width Effects in Top Quark Decays

Details Finite Width Effects in Top Quark Decays Finite Width Effects in Top Quark Decays

1994-12-06

arxiv.org/abs/hep-ph/9412250v1

Phys.Lett. B347 (1995) 394-398

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, Revtex, 3 uuencoded figures included

Scientific paper

10.1016/0370-2693(95)00083-W

Motivated by evidence that the top quark mass lies near the $bWZ$ threshold, we compute the decay rate for $t\rightarrow bWZ$ in the Standard Model, including the effects of the finite widths of the $W$ and $Z$ bosons. In the limit where the width effects are negligible, our results disagree with previously published calculations. We also examine the decay $t\rightarrow bWH$. Although the widths induce a sizable enhancement near threshold for both decays, we find that the rates are still too small to be observed in the present generation of experiments. This means that detection of either mode in one of these experiments would be a signal of new physics.

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