Rare top quark decays t{r_arrow}bW{sup +}Z and t{r_arrow}cW{sup +}W{sup {minus}}
- Department of Physics, University of California at San Diego, La Jolla, California 92093 (United States)
The large value of the top quark mass implies that the rare top quark decays t{r_arrow}bW{sup +}Z, sW{sup +}Z, and dW{sup +}Z, and t{r_arrow}cW{sup +}W{sup {minus}} and uW{sup +}W{sup {minus}}, are kinematically allowed so long as m{sub t}{ge}m{sub W}+m{sub Z}+m{sub d{sub i}}{approx}171.5GeV+m{sub d{sub i}} or m{sub t}{ge}2m{sub W}+m{sub u,c}{approx}160.6GeV+m{sub u,c}, respectively. The partial decay widths for these decay modes are calculated in the standard model. The partial widths depend sensitively on the precise value of the top quark mass. The branching ratio for t{r_arrow}bW{sup +}Z is as much as 1{times}10{sup {minus}5} for m{sub t}=200 GeV, and could be observable at the CERN Large Hadron Collider. The rare decay modes t{r_arrow}cW{sup +}W{sup {minus}} and uW{sup +}W{sup {minus}} are highly Glashow-Iliopoulos-Maiani (GIM) suppressed, and thus provide a means for testing the GIM mechanism for three generations of quarks in the u, c, t sector. {copyright} {ital 1997} {ital The American Physical Society}
- Research Organization:
- Univ. of California (United States)
- DOE Contract Number:
- FG03-90ER40546
- OSTI ID:
- 531988
- Journal Information:
- Physical Review, D, Vol. 56, Issue 1; Other Information: PBD: Jul 1997
- Country of Publication:
- United States
- Language:
- English
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