Nonoblique Corrections in Technicolor Theories Revisited

Abstract

In extended technicolor (ETC) theories, while the sideways ETC boson exchange decreases the width ${\Gamma }_b\equiv \Gamma (Z\to b\bar{b})$, the flavor-diagonal ETC boson exchange tends to increase it, and the ETC-corrected $R_b \equiv Γ_b / Γ_{\mbox{\footnotesize had}}$ value could agree with recent measurements. The $\tau$ asymmetry parameter may also increase in a way consistent with experiment. The weak-interaction $\rho$ parameter receives a correction from diagonal ETC exchange which is just barely acceptable by experiments.

importance of the rho parameter constraint included, version appeared in PRL 74 4137 (1995)

References in corpus (7)

• A Heavy Top Quark and the $Zb\bar{b}$ Vertex in Non-Commuting Extended Technicolor
• Revenge of the One-Family Technicolor Models
• An Extended Technicolor Model
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• Walking Technicolor And The $Zb\bar{b}$ Vertex
• A Dynamical Origin for the Top Mass
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• Multiscale Technicolor and the Zbb-bar Vertex
• Are Four-Fermion Operators Relevant for the Fermion Mass Problem?
• t anti-t Production Rates at the Tevatron and the LHC in Topcolor- Assisted Multiscale Technicolor Models
• Limits on Non-Standard Top Quark Couplings from Electroweak Measurements
• Phenomenology of the Top Mass in Realistic Extended Technicolor Models
• Radiative Corrections to the Z-b-(anti-b) and Z-tau-(anti-tau) Vertices in a Realistic One-Family Extended Technicolor Model
• An Extended Technicolor Model With QCD-like Symmetry Breaking
• General constraints on light resonances in a strongly coupled symmetry breaking sector
• The Oblique Corrections from the Diagonal ETC Interaction
• A viable one-family technicolor model
• Possible explanation of Zbb vertex anomaly in one-family technicolor models
• Implications of m_t and R_b on zt\bar{t} couplings in standard ETC models