An Effective Higgsless Theory: Satisfying Electroweak Constraints and a Heavy Top Quark

Abstract

The main challenge faced by Higgsless models of electroweak symmetry breaking is to reconcile the experimental constraints imposed by the precision electroweak data and the top quark phenomenology with the unitarity constraints imposed by longitudinal gauge boson scattering amplitudes. In this paper we expand on previous work, giving details of how delocalized fermions can be used to adjust the $S$ parameter to zero, while keeping the $T$ and $U$ parameters naturally suppressed. We also show that it is possible to obtain the top quark mass, without affecting the delay of unitarity violation of the $W^{+}{W}^{-}\to W^{+}{W}^{-}$ scattering amplitude, by separating the mass scales of the fermion sector ($1/R_f$) from that of the gauge sector ($1/R_g$). The fermion sector scale $1/R_f$ is only weakly constrained by unitarity of the $t\bar{t}\to W^{+}{W}^{-}$ scattering amplitude; thus the ratio $R_g/R_f$ can be quite large, and the top mass can be easily achieved. Anomalous right-handed couplings involving the third generation quarks also avoid constraints from experimental data if $1/R_f$ is sufficiently large.

arXiv comment26 pages, JHEP format

References in corpus (37)

• (De)Constructing Dimensions
• Electroweak symmetry breaking after LEP1 and LEP2
• Holography and Phenomenology
• Comments on the Holographic Picture of the Randall-Sundrum Model
• Towards a Realistic Model of Higgsless Electroweak Symmetry Breaking
• Gauge Invariant Effective Lagrangian for Kaluza-Klein Modes
• Fermions on an Interval: Quark and Lepton Masses without a Higgs
• Model-Independent Global Constraints on New Physics
• Weakly coupled Higgsless theories and precision electroweak tests
• Unitarity of Compactified Five Dimensional Yang-Mills Theory
• Curing the Ills of Higgsless Models: the S Parameter and Unitarity
• Randall-Sundrum models and the regularized AdS/CFT correspondence
• Higgsless Theory of Electroweak Symmetry Breaking from Warped Space
• Unitarity of the Higher Dimensional Standard Model
• Oblique Corrections from Higgsless Models in Warped Space
• Holographic Theories of Electroweak Symmetry Breaking without a Higgs Boson
• The Structure of Corrections to Electroweak Interactions in Higgsless Models
• Higgsless Electroweak Symmetry Breaking from Theory Space
• Collider Phenomenology of the Higgsless Models
• Analysis of tbW and ttZ couplings from CLEO and LEP/SLC data
• Effects of Fermion Localization in Higgsless Theories and Electroweak Constraints
• The role of spurions in Higgs-less electroweak effective theories
• Ideal Fermion Delocalization in Higgsless Models
• Higgsless Electroweak Symmetry Breaking in Warped Backgrounds: Constraints and Signatures
• Fun with Higgsless Theories
• Top and Bottom: a Brane of Their Own
• Playing with fermion couplings in Higgsless models
• Moose models with vanishing $S$ parameter
• Universal Non-Oblique Corrections in Higgsless Models and Beyond
• Deconstructed Higgsless Models with One-Site Delocalization
• Electroweak Corrections and Unitarity in Linear Moose Models
• Warped Higgsless Models with IR--Brane Kinetic Terms
• A note on CFT dual of RS model with gauge fields in bulk
• Gauge-Assisted Technicolor?
• 6D Higgsless Standard Model
• Unitarity constraints on top quark signatures of Higgsless models
• Chiral Fermion Delocalization in Deconstructed Higgsless Theories

Cited by in corpus (23)

• Physics searches at the LHC
• A Three Site Higgsless Model
• A New Custodian for a Realistic Higgsless Model
• A Model of Electroweak Symmetry Breaking from a Fifth Dimension
• One-Loop Corrections to the S and T Parameters in a Three Site Higgsless Model
• Symmetry and geometry in generalized Higgs effective field theory -- Finiteness of oblique corrections v.s. perturbative unitarity
• The Three Site Model at One-Loop
• General Sum Rules for WW Scattering in Higgsless Models: Equivalence Theorem and Deconstruction Identities
• The Top Triangle Moose: Combining Higgsless and Topcolor Mechanisms for Mass Generation
• Ideal Fermion Delocalization in Five Dimensional Gauge Theories
• Chiral-logarithmic Corrections to the S and T Parameters in Higgsless Models
• Does the three site Higgsless model survive the electroweak precision tests at loop?
• Discovering Strong Top Dynamics at the LHC
• Z to b bbar and Chiral Currents in Higgsless Models
• Deconstruction and Elastic pi pi Scattering in Higgsless Models
• Holographic approach to a minimal Higgsless model
• Effective fermion couplings in warped 5D Higgsless theories
• Unitarity and Bounds on the Scale of Fermion Mass Generation
• Improved analysis of the bounds from the electroweak precision tests on the 4-site model
• The Flavor Structure of the Three-Site Higgsless Model
• The new charged gauge boson $W^{\prime }$ and the subprocess $eq\to \nu q^{\prime }$ at $e^{+}{e}^{-}$ and $ep$ colliders
• One Loop Corrections to the Rho Parameter in Higgsless Models
• From hidden symmetry to extra dimensions: a five dimensional formulation of the Degenerate BESS model