Probing the mechanism of EWSB with a rho parameter defined in terms of Higgs couplings

Abstract

A definition of the rho parameter based on the Higgs couplings with the gauge bosons, rho_h= g_{hWW}}/c^2_W g_{hZZ}, is proposed as a new probe into the origin of the mechanism of electroweak symmetry breaking. While ${\rho }_h=1$ holds in the SM, deviations from one are predicted in models with extended Higgs sector. We derive a general expresion of rho_h for a model with arbitrary Higgs multiplets, and discuss its size within the context of specific models with Higgs triplets, including the ``Little Higgs'' models recently proposed. We find the even for Higgs models that incorporate the custodial symmetry to make rho=1, one could have rho_h\neq 1, which could be tested at the level of a few percent, with the precision Higgs meassurements expected at the NLC.

12 pages, 2 figures

References in corpus (8)

• The Minimal Moose for a Little Higgs
• Phenomenology of the Little Higgs Model
• Neutrino Masses and Leptogenesis with Heavy Higgs Triplets
• Report of the Higgs Working Group of the Tevatron Run 2 SUSY/Higgs Workshop
• Electroweak Data and the Higgs Boson Mass: A Case for New Physics
• Recent Developments in Precision Electroweak Physics
• Precision Studies of the Higgs Boson Profile at the e+e- Linear Collider
• The Global Electroweak Fit

Cited by in corpus (11)

• Measuring the fermionic couplings of the Higgs boson at future colliders as a probe of a non-minimal flavor structure
• Flavor Violating Higgs signals in the Texturized Two-Higgs Doublet Model (2HDM-Tx)
• Boosting Higgs CP properties via VH Production at the Large Hadron Collider
• Updated global fit of the aligned two-Higgs-doublet model with heavy scalars
• Light scalars within the $\mathcal{C}\mathcal{P}$-conserving Aligned-two-Higgs-doublet model
• Gauge-Higgs unification with brane kinetic terms
• Electroweak monopoles and magnetic dumbbells in grand unified theories
• Phenomenological profile of scotogenic fermionic dark matter
• Higgs-like particle decays into $\gamma Z$ and $\gamma \gamma$ : Fingerprints of some non-supersymmetric models
• Electroweak-Higgs Unification and the Higgs Boson Mass
• Low energy theorems and the unitarity bounds in the extra U(1) superstring inspired E6 models