Oblique S and T Constraints on Electroweak Strongly-Coupled Models with a Light Higgs
arXiv:1310.3121 · doi:10.1007/JHEP01(2014)157
Abstract
Using a general effective Lagrangian implementing the chiral symmetry breaking SU(2)L x SU(2)R -> SU(2){L+R}, we present a one-loop calculation of the oblique S and T parameters within electroweak strongly-coupled models with a light scalar. Imposing a proper ultraviolet behaviour, we determine S and T at next-to-leading order in terms of a few resonance parameters. The constraints from the global fit to electroweak precision data force the massive vector and axial-vector states to be heavy, with masses above the TeV scale, and suggest that the W+W- and ZZ couplings of the Higgs-like scalar should be close to the Standard Model value. Our findings are generic, since they only rely on soft requirements on the short-distance properties of the underlying strongly-coupled theory, which are widely satisfied in more specific scenarios.
33 pages, 7 figures. Version published in JHEP. Some references and sentences have been added to facilitate the discussion. Specifically, note comments and references about possible fermionic resonances in Section 3. arXiv admin note: text overlap with arXiv:1206.3454
References in corpus (26)
- Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
- Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
- Light custodians in natural composite Higgs models
- Evidence for the spin-0 nature of the Higgs boson using ATLAS data
- Measurements of Higgs boson production and couplings in diboson final states with the ATLAS detector at the LHC
- Light scalar at LHC: the Higgs or the dilaton?
- Study of the mass and spin-parity of the Higgs boson candidate via its decays to Z boson pairs
- Complete Electroweak Chiral Lagrangian with a Light Higgs at NLO
- Evidence for a particle produced in association with weak bosons and decaying to a bottom-antibottom quark pair in Higgs boson searches at the Tevatron
- The Higgs boson from an extended symmetry
- Towards a consistent estimate of the chiral low-energy constants
- Light top partners and precision physics
- Tasi 2009 lectures: The Higgs as a Composite Nambu-Goldstone Boson
- New Prospects for Higgs Compositeness in h -> Z gamma
- Form-factors and current correlators: chiral couplings L_10(mu) and C_87(mu) at NLO in 1/N(C)
- Heavy Vectors in Higgs-less models
- Magnetic S-parameter
- One-Loop Corrections to the S and T Parameters in a Three Site Higgsless Model
- WW Scattering in Walking Technicolor
- The Three Site Model at One-Loop
- Flavor Dependence of the S-parameter
- Quantum Corrections in the Resonance Chiral Theory
- Renormalizable Sectors in Resonance Chiral Theory: S -> pi pi Decay Amplitude
- Strongly Coupled Models with a Higgs-like Boson
- On the structure of two-point Green-functions at next-to-leading order in 1/Nc
- The Physics of the Higgs-like Boson
Cited by in corpus (29)
- QCD and strongly coupled gauge theories: challenges and perspectives
- Electroweak precision observables and Higgs-boson signal strengths in the Standard Model and beyond: present and future
- Electroweak Effective Operators and Higgs Physics
- Beyond Geolocating: Constraining Higher Dimensional Operators in with Off-Shell Production and More
- One-loop and from the Electroweak Chiral Lagrangian with a light Higgs-like scalar
- A UV complete partially composite-pNGB Higgs
- Crawling technicolor
- Unitarity and causality constraints in composite Higgs models
- Vector and Axial-vector resonances in composite models of the Higgs boson
- One-loop renormalization of the electroweak chiral Lagrangian with a light Higgs
- The flair of Higgsflare: Distinguishing electroweak EFTs with
- Fingerprints of heavy scales in electroweak effective Lagrangians
- Update of the electroweak precision fit, interplay with Higgs-boson signal strengths and model-independent constraints on new physics
- Low-energy signals of strongly-coupled electroweak symmetry-breaking scenarios
- Production of vector resonances at the LHC via WZ-scattering: a unitarized EChL analysis
- Strongly coupled theories beyond the Standard Model
- Colorful Imprints of Heavy States in the Electroweak Effective Theory
- Interpreting a 2 TeV resonance in WW scattering
- Resonance effects in pion and kaon decay constants
- A bottom-up approach within the electroweak effective theory: constraining heavy resonances
- Origin of the VEVs hierarchy
- Resonant production of Wh and Zh at the LHC
- Dispersion Relations for Electroweak Observables in Composite Higgs Models
- Tracks of resonances in electroweak effective Lagrangians
- A few words about Resonances in the Electroweak Effective Lagrangian
- LHC vector resonance searches in the final state
- Probing the Top-Higgs Sector with Composite Higgs Models at Present and Future Hadron Colliders
- Dark-technicolour at colliders
- Viability of light-Higgs strongly-coupled scenarios