arXiv:1201.4383·v1·High Energy Physics — Phenomenology
Electroweak Corrections from Triplet Scalars
Zuhair U. Khandker🇺🇸 · Daliang Li🇺🇸 · Witold Skiba🇺🇸
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.
Comments: 18 pages