Z physics effects of an additional non-sequential bottom quark

Martinez, R.; Rodriguez, J-Alexis; Vargas, M.; Zuluaga, I. D.
August 2000
AIP Conference Proceedings;2000, Vol. 531 Issue 1, p326
Academic Journal
We analyze the Zff vertex in the framework of models that add a new bottom quark in a non-sequential way and we evaluate the tree level contribution to the LEP/SLC observables Γ[sub Z], R[sub b] and R[sub l]. We obtain bounds for the mixing angles from the experimentally allowed contour regions of the parameters Λ[sub L,R] introduced here. In order to get a more restrictive region, we consider the experimental results for B → vvX as well.


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