Electroweak Corrections from Triplet Scalars

Abstract

We compute the electroweak S and T parameters induced by SU(2)_L triplet scalars up to one-loop order. We consider the most general renormalizable potential for a triplet and the Standard Model Higgs doublet. Our calculation is performed by integrating out the triplet at the one-loop level and also includes the one-loop renormalization group running. Effective field theory framework allows us to work in the phase with unbroken SU(2)_L x U(1)_Y symmetry. Both S and T parameters exhibit decoupling when all dimensionful parameters are large while keeping dimensionless ratios fixed. We use bounds on S and T to constrain the triplet mass and couplings.

18 pages

References in corpus (6)

• Cosmology and Astrophysics of Minimal Dark Matter
• Triplet Scalars and Dark Matter at the LHC
• (Non)decoupling of the Higgs triplet effects
• Higgs Triplets and Limits from Precision Measurements
• Low-Energy Effective Theory, Unitarity, and Non-Decoupling Behavior in a Model with Heavy Higgs-Triplet Fields
• Violation of the Appelquist-Carazzone decoupling in non-SUSY GUT

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