Electroweak precision observables at one loop in Higgsless models
- Departament de Fisica Teorica, IFIC, Universitat de Valencia-CSIC, Apartat de Correus 22085, E-46071 Valencia (Spain)
- J. Stefan Institute, Jamova 39, Post Office Box 3000, 1001 Ljubljana (Slovenia)
We study the viability of generic Higgsless models at low energies when compliance with electroweak precision observables 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{sub V} < or approx. 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{sub V} is still predicted to be light (below 1 TeV) while typical values of m{sub A} span over the window 1.2m{sub V}{<=}m{sub A}{<=}1.4m{sub 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.
- OSTI ID:
- 21578175
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevD.83.053010; (c) 2011 American Institute of Physics; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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