One-loop corrections in the complex Higgs triplet model shift the 125 GeV Higgs decay rates to WW* and ZZ* upward by a few percent relative to the SM, while allowing up to -20% deviation in gamma gamma and 100% in the self-coupling.
Higgs triplets and limits from precision measurements
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abstract
In this letter, we present our results on a global fit to precision electroweak data in a Higgs triplet model. In models with a triplet Higgs boson, a consistent renormalization scheme differs from that of the Standard Model and the global fit shows that a light Higgs boson with mass of 100-200 GeV is preferred. Triplet Higgs bosons arise in many extensions of the Standard Model, including the left-right model and the Little Higgs models. Our result demonstrates the importance of the scalar loops when there is a large mass splitting between the heavy scalars. It also indicates the significance of the global fit.
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The ΔSM real Higgs triplet model is consistent with LHC triboson excesses but predicts more events than observed and is not preferred over the Standard Model.
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Radiative corrections to decays of the 125 GeV Higgs boson in the complex Higgs triplet model
One-loop corrections in the complex Higgs triplet model shift the 125 GeV Higgs decay rates to WW* and ZZ* upward by a few percent relative to the SM, while allowing up to -20% deviation in gamma gamma and 100% in the self-coupling.
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Multi-Lepton Probes of the Drell-Yan Production of Triplet Higgses
The ΔSM real Higgs triplet model is consistent with LHC triboson excesses but predicts more events than observed and is not preferred over the Standard Model.