The $R_b$ Excess at LEP: Clue to New Physics at the TEVATRON?

Details The $R_b$ Excess at LEP: Clue to New Physics at the TEVATRON? The $R_b$ Excess at LEP: Clue to New Physics at the TEVATRON?

1995-05-09

arxiv.org/abs/hep-ph/9505268v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures

Scientific paper

10.1063/1.49317

If the $R_b$ excess at LEP is real, then any explanation in terms of
renormalizable loop corrections leads to important new decay modes of the $t$
quark and suppresses the $t \to bW$ branching ratio. In the two-Higgs-doublet
model, the branching ratio of $Z \to b \bar b$ + a light boson which decays
itself predominantly into $b \bar b$ is at least of order $10^{-4}$.

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