ElectroWeak Precision Observables at One-Loop in Higgsless models

Abstract

We study the viability of generic Higgsless models at low energies when compliance with EWPO and unitarity constraints up to the TeV scale are imposed. Our analysis shows that consistency with S and T can be achieved at the one-loop level even with a single light vector state, m_V <= 500 GeV. However, this scenario turns out to be strongly disfavored when direct resonance searches at the Tevatron are also taken into account. We show that a fully consistent picture can be obtained if an axial state is introduced. Interestingly, m_V is still predicted to be light (below 1 TeV) while typical values of m_A span over the window 1.2 m_V <= m_A <= 1.4 m_V. Our results for the vector channel are rather robust and well within the reach of present-day colliders, while the axial channel is more loosely constrained.

16 pages, 13 figures, error corrected in Eq. (17), conclusions unchanged

References in corpus (14)

• A Three Site Higgsless Model
• Composite fermions in Electroweak Symmetry Breaking
• Heavy Vectors in Higgs-less models
• Describing viable technicolor scenarios
• One-Loop Corrections to the S and T Parameters in a Three Site Higgsless Model
• Search for WW and WZ resonances decaying to electron, missing ET, and two jets in ppbar collisions at sqrt(s) = 1.96 TeV
• Exploring T and S parameters in Vector Meson Dominance Models of Strong Electroweak Symmetry Breaking
• Benchmarks for new strong interactions at the LHC
• The Three Site Model at One-Loop
• Measurement of the $WZ\to \ell \nu \ell \ell$ cross section and limits on anomalous triple gauge couplings in $p\bar{p}$ collisions at $\sqrt{s}$ = 1.96 TeV
• Drell-Yan production of Heavy Vectors in Higgsless models
• 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?
• One-loop Corrections to the S Parameter in the Four-site Model

Cited by in corpus (11)

• QCD and strongly coupled gauge theories: challenges and perspectives
• Massive vectors and loop observables: the $g-2$ case
• Viability of strongly-coupled scenarios with a light Higgs-like boson
• A UV complete partially composite-pNGB Higgs
• Oblique S and T Constraints on Electroweak Strongly-Coupled Models with a Light Higgs
• If no Higgs then what?
• Exploring T and S parameters in Vector Meson Dominance Models of Strong Electroweak Symmetry Breaking
• One-Loop Calculation of the Oblique S Parameter in Higgsless Electroweak Models
• Lurking pseudovectors below the TeV scale
• A few words about Resonances in the Electroweak Effective Lagrangian
• One-loop effects from spin-1 resonances in Composite Higgs models