Phenomenology of the Top Mass in Realistic Extended Technicolor Models

Abstract

Extended technicolor (ETC) theories typically require ETC gauge bosons lighter than of order 1 TeV, to perturbatively generate the $t$ quark mass. We point out that explicit models of $t-b$ mass splitting also typically contain additional TeV scale ETC gauge bosons transforming in the {\it adjoint} of technicolor, leading to large weak-isospin-breaking effects observable in the $\rho$ parameter. Viable ETC models may thus require a lowest ETC scale of order 10 TeV, with relatively strong and finely tuned couplings to generate $m_t$. Such models do not generate observable corrections to the $Zb\bar{b}$ vertex.

LaTex, 12 pages, including 2 EPS figures in 5 files

References in corpus (14)

• Topcolor Assisted Technicolor
• Natural Topcolor--Assisted Technicolor
• A Heavy Top Quark and the $Zb\bar{b}$ Vertex in Non-Commuting Extended Technicolor
• Non-Oblique Effects in the Z b b_bar Vertex from ETC Dynamics
• Implications of High Precision Experiments and the CDF Top Quark Candidates
• Isospin Breaking and Fine Tuning in Top-Color Assisted Technicolor
• Hints of New Flavor Physics at LEP?
• Walking Technicolor And The $Zb\bar{b}$ Vertex
• ETC With a GIM Mechanism
• Extended technicolor contribution to the Zbb vertex
• Strong Extended Technicolour Interactions and the $Zb\bar{b}$ Vertex
• Nonoblique Corrections in Technicolor Theories Revisited
• Chiral Technicolor and Precision Electroweak Measurements
• Physics from Vacuum Alignment in A Technicolor Model

Cited by in corpus (11)

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• Flavour Universal Dynamical Electroweak Symmetry Breaking
• Z Boson Propagator Correction in Technicolor Theories with ETC Effects Included
• The Effective Lagrangian of the Two Higgs Doublet Model
• Extended Technicolor Models with Two ETC Groups
• Ultraviolet Extension of a Model with Dynamical Electroweak Symmetry Breaking by Both Top-Quark and Technifermion Condensates
• Strong interactions in air showers
• Holograms of a Dynamical Top Quark
• Implications of m_t and R_b on zt\bar{t} couplings in standard ETC models