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arxiv: hep-ph/9604214 · v1 · submitted 1996-04-02 · ✦ hep-ph

Violations of universality in a vectorlike extension of the standard model

classification ✦ hep-ph
keywords modelstandardextensionfermionmirroruniversalityvectorlikeviolations
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Violations of universality of couplings in a vectorlike extension of the standard model with three heavy mirror fermion families are considered. The recently observed discrepancies between experiments and the standard model in the hadronic branching fractions $R_b$ and $R_c$ of the Z-boson are explained by the mixing of fermions with their mirror fermion partners.

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