The /t>WZb decay in the Standard Model: a critical reanalysis
Abstract
We compute the /t>WZb decay rate, in the Standard Model, at the leading order in perturbation theory, with special attention to the effects of the finite widths of the /W and /Z bosons. These effects are extremely important, since the /t>WZb decay occurs near its kinematical threshold. They increase the value of the decay rate by orders of magnitude near threshold or allow it below the nominal threshold. We discuss a procedure to take into account the finitewidth effects and compare the results with previous studies of this decay. Within the Standard Model, for a top quark mass in the range between 170 and 180 GeV, we find BR(t>WZb)~=2×10^{6}, which makes the observation at the LHC very difficult if at all possible.
 Publication:

Physics Letters B
 Pub Date:
 March 2001
 DOI:
 10.1016/S03702693(00)013332
 arXiv:
 arXiv:hepph/0010090
 Bibcode:
 2001PhLB..502..125A
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 10 pages, 4 eps figures, LaTeX. Few references added and minor changes in the text. Results unchanged. Final version to appear on PLB