Hypercharge-Universal Topcolor

Abstract

We propose and discuss the phenomenology of a Topcolor-assisted Technicolor (TC2) model with a flavor-universal hypercharge sector. After discussing the symmetry breaking pattern and low-energy effective Lagrangian, we examine various experimental and theoretical constraints, finding that precision electroweak measurements yield the strongest bounds on the model. We perform a combined fit to all available $Z$-pole and LEP2 data and find that the goodness of fit for hypercharge-universal topcolor is comparable to that of the Standard Model. In contrast, TC2 models with a flavor non-universal hypercharge sectors are markedly disfavored by the data.

21 pages, 11 eps figures, reference and clarifying remarks added

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Cited by in corpus (23)

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• Axigluons cannot explain the observed top quark forward-backward asymmetry
• New physics effects on top quark spin correlation and polarization at the LHC: a comparative study in different models
• Production of Massive Color-Octet Vector Bosons at Next-to-Leading Order
• Top condensation as a motivated explanation of the top forward-backward asymmetry
• Hadron Collider Production of Massive Color-Octet Vector Bosons at Next-to-Leading Order
• The Nambu sum rule and the relation between the masses of composite Higgs bosons
• The Top Triangle Moose: Combining Higgsless and Topcolor Mechanisms for Mass Generation
• Probing topcolor-assisted technicolor from top charge asymmetry and triple-top production at the LHC
• Top-Higgs and Top-pion phenomenology in the Top Triangle Moose model
• LHC Limits on the Top-Higgs in Models with Strong Top-Quark Dynamics
• Discovering Strong Top Dynamics at the LHC
• Scalar excitation with Leggett frequency in ${}^3$ He-B and the $125$ GeV Higgs particle in top quark condensation models as Pseudo - Goldstone bosons
• Gauge theory of Lorentz group as a source of the dynamical electroweak symmetry breaking
• Ultraviolet Extension of a Model with Dynamical Electroweak Symmetry Breaking by Both Top-Quark and Technifermion Condensates
• Azimuthal decorrelation in $t\bar{t}$ production at hadron colliders
• Schwinger - Dyson equation and NJL approximation in massive gauge theory with fermions
• Z' Boson Mixings with Z-γand Charge Assignments
• Electroweak Chiral Lagrangian for a Hypercharge-universal Topcolor Model
• Modified top quark condensation model with the extra heavy fermion, the $125$ GeV Pseudo - Goldstone boson, and the additional heavy scalar bosons
• Topcolor in the LHC Era
• Electroweak Chiral Lagrangian from TC2 Model with nontrivial TC fermion condensation and walking
• The Limits of Custodial Symmetry