6533b870fe1ef96bd12d07c6
RESEARCH PRODUCT
Strongly Coupled Models with a Higgs-like Boson
Ignasi RosellIgnasi RosellJuan José Sanz-cilleroAntonio Pichsubject
PhysicsParticle physicsPhysicsQC1-999Electroweak interactionScalar (mathematics)High Energy Physics::PhenomenologyFOS: Physical sciencesStandard ModelHigh Energy Physics - PhenomenologyCoupling (physics)High Energy Physics - Phenomenology (hep-ph)Higgs bosonSymmetry breakingSum rule in quantum mechanicsBosondescription
Considering the one-loop calculation of the oblique S and T parameters, we have presented a study of the viability of strongly-coupled scenarios of electroweak symmetry breaking with a light Higgs-like boson. The calculation has been done by using an effective Lagrangian, being short-distance constraints and dispersive relations the main ingredients of the estimation. Contrary to a widely spread believe, we have demonstrated that strongly coupled electroweak models with massive resonances are not in conflict with experimental constraints on these parameters and the recently observed Higgs-like resonance. So there is room for these models, but they are stringently constrained. The vector and axial-vector states should be heavy enough (with masses above the TeV scale), the mass splitting between them is highly preferred to be small and the Higgs-like scalar should have a WW coupling close to the Standard Model one. It is important to stress that these conclusions do not depend critically on the inclusion of the second Weinberg sum rule.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-07-08 |