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

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.

14 pages, (uses harmac.tex), BUHEP-94-8

References in corpus (3)

• Non-Oblique Effects in the Z b b_bar Vertex from ETC Dynamics
• Walking Technicolor And The $Zb\bar{b}$ Vertex
• Non-oblique Correction in Extenden Technicolor Theory

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