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arXiv · hep-ph/9404209

A Heavy Top Quark and the $Zb\bar{b}$ Vertex in Non-Commuting Extended Technicolor

R. S. Chivukula·E. H. Simmons·J. Terning
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Abstract

We explore corrections to electroweak parameters in the context of Extended Technicolor (ETC) models in which the ETC gauge-boson which generates the top-quark mass carries weak $SU(2)$ charge. For $m_t \sim 150$ GeV there exist potentially large corrections to the $Z$ decay width to $b$-quarks. Interestingly, in contrast to the situation in ETC models where the gauge-boson which generates the top-quark mass is a weak $SU(2)$ singlet, the corrections may {\it increase} the $Z \to b \bar{b}$ branching ratio.

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R. S. Chivukula, E. H. Simmons, J. Terning. 1994-04-04. A Heavy Top Quark and the $Zb\bar{b}$ Vertex in Non-Commuting Extended Technicolor. https://doi.org/10.1016/0370-2693(94)91068-5

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