Technifermion Representations and Precision Electroweak Constraints

Abstract

We discuss the selection of fermion representations in technicolor models with a view toward minimizing technicolor contributions to the precision electroweak $S$ parameter. We present and analyze models that involve one technifermion SU(2)${}_L$ doublet with standard-model singlet technifermion sectors that lead to walking behavior, which further reduces $S$. We also consider models that have technifermions in higher-dimensional representations and study embeddings in extended technicolor theories.

8 pages, latex

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• Fermion Masses and Mixing in Extended Technicolor Models
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Cited by in corpus (46)

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• Ultra Minimal Technicolor and its Dark Matter TIMP
• Towards Working Technicolor: Effective Theories and Dark Matter
• Higher-Loop Corrections to the Infrared Evolution of a Gauge Theory with Fermions
• Light composite Higgs and precision electroweak measurements on the Z resonance: An update
• Fundamental Composite Electroweak Dynamics: Status at the LHC
• Conformal Windows of SP(2N) and SO(N) Gauge Theories
• Discovering Technicolor
• Phenomenology of The Left-Right Twin Higgs Model
• Conformal Window of Gauge Theories with Four-Fermion Interactions and Ideal Walking
• From the LHC to Future Colliders
• Dynamical Stabilization of the Fermi Scale: Phase Diagram of Strongly Coupled Theories for (Minimal) Walking Technicolor and Unparticles
• Behavior of the S Parameter in the Crossover Region Between Walking and QCD-Like Regimes of an SU(N) Gauge Theory
• Discovering 125 GeV techni-dilaton at LHC
• The Electroweak Phase Transition in Nearly Conformal Technicolor
• Holographic Techni-dilaton
• pi^+ - pi^0 mass difference and S parameter in the large N_f QCD
• Gauge Coupling Unification via A Novel Technicolor Model
• Z Boson Propagator Correction in Technicolor Theories with ETC Effects Included
• Dilaton at the LHC
• Conformal House
• Higher Representations Duals
• Flavor Dependence of the S-parameter
• An Effective Lagrangian for Low-Scale Technicolor
• Generational Structure of Models with Dynamical Symmetry Breaking
• Infrared Evolution and Phase Structure of a Gauge Theory Containing Different Fermion Representations
• A mass-dependent beta-function
• Dual of QCD with One Adjoint Fermion
• The Electroweak Phase Transition in Ultra Minimal Technicolor
• Hadron Collider Searches for Diboson Resonances
• Extended Technicolor Models with Two ETC Groups
• The Effects on $S$, $T$, and $U$ from Higher-Dimensional Fermion Representations
• Quasiconformality and mass
• Further Study of an Approach to the Unification of Gauge Symmetries in Theories with Dynamical Symmetry Breaking
• Technicolor and Beyond: Unification in Theory Space
• Supersymmetric Extensions and Dark Matter in Models of Warped Higgsless EWSB
• Study of an Alternate Mechanism for the Origin of Fermion Generations
• Minimal Flavor Constraints for Technicolor
• Technicolor contribution to lepton + photon + missing energy events at the Tevatron
• Search for Low-Scale Technicolor at the Tevatron
• Technicolor Models with Color-Singlet Technifermions and their Ultraviolet Extensions
• Anomalous Dimensions at an Infrared Fixed Point in an SU($N_c$) Gauge Theory with Fermions in the Fundamental and Antisymmetric Tensor Representations
• Constraints on Majorana Dark Matter from a Fourth Lepton Family
• The Conformal Window and Walking Technicolor