{ital Z}{implies}{ital b}{ital b}{vert_bar} excess and top quark decay
- Department of Physics, University of California, Riverside, California 92521 (United States)
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia (Canada) V6T 2A3
The apparent excess of {ital Z}{implies}{ital b}{ital b}{vert_bar} events at CERN LEP may be an indication of new physics beyond the standard model. However, in either the two-Higgs-doublet model or the minimal supersymmetric standard model any explanation would lead to an important new decay mode of the top quark and suppresses the {ital t}{implies}{ital W}{ital b} branching fraction, which goes against what has been observed at the Fermilab Tevatron. In the two-Higgs-doublet model, the branching fraction of {ital Z}{implies}{ital b}{ital b}{vert_bar}+a light boson which decays predominantly into {ital bb{vert_bar}} would be at least of order 10{sup -}{sup 4}. {copyright} {ital 1995 The American Physical Society.}
- Research Organization:
- University of California
- DOE Contract Number:
- FG03-94ER40837
- OSTI ID:
- 254185
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 1 Vol. 53; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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