Higgs singlet extension parameter space in the light of the LHC discovery
By G. M. Pruna, T. Robens. 2013
139 citations recorded by the source corpus.
In this note we propose an overview on the current theoretical and experimental limits on a Higgs singlet extension of the Standard Model. We assume that the Boson which has recently been observed by the LHC experiments is the lightest Higgs Boson of such model, while for the second Higgs Boson we consider a mass range of 600 GeV mH 1 TeV, where our model directly corresponds to a benchmark scenario of the heavy Higgs working group. In this light, we study the impact of perturbative unitarity limits, renormalisation group equations analysis and experimental constraints (electroweak precision tests, measurements of the observed light Higgs coupling strength at the Large Hadron Collider). We show that, in the case of no additional hidden sector contributions, the largest constraints for higher Higgs masses stem from the assumption of perturbativity as well as vacuum stability for scales of the order of the SM metastability scale, and that the allowed mixing range is severely restricted. We discuss implications for current LHC searches in the singlet extension, especially the expected suppression factors for SM-like decays of the heavy Higgs. We present these results in terms of a global scaling factor as well as the total width of the new scalar.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/925b1eefd852477909073b379a6029360e74d216
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In Nuclear and High Energy Physics
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Citations in the corpus
- Building and testing models with extended Higgs sectors (2017, background): “Several detailed phenomenological studies have been published over the last decade, both in the pre-LHC era [364, 352] and in the recent years [365, 152, 354, 356, 361, 366].”
- Physics at a 100 TeV pp collider: Higgs and EW symmetry breaking studies (2016, background): “Not only can φ be probed effectively in an indirect way by global Higgs fits [381, 382] but also in direct searches without involvement of the Higgs boson.”