TY - JOUR
T1 - Finite width effects in top quark decays
AU - Mahlon, Gregory
AU - Parke, Stephen
N1 - Funding Information:
We would like to thank Keith Ellis for useful discussions. This work was performed at the Fermi National Accelerator Laboratory, which is operated by Universities Research Association, Inc., under contract DE-AC02-76CH03000 with the US Department of En-
PY - 1995/3/23
Y1 - 1995/3/23
N2 - Motivated by evidence that the top quark mass lies near the b WZ threshold, we compute the decay rate for t → b WZ 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 → b WH. 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.
AB - Motivated by evidence that the top quark mass lies near the b WZ threshold, we compute the decay rate for t → b WZ 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 → b WH. 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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U2 - 10.1016/0370-2693(95)00083-W
DO - 10.1016/0370-2693(95)00083-W
M3 - Article
AN - SCOPUS:0000226138
VL - 347
SP - 394
EP - 398
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 3-4
ER -