New theoretical constraints on scalar color octet models

Abstract

We study theoretical constraints on a model whose scalar sector contains one color octet and one or two color singlet $SU(2{)}_L$ doublets. Using the unitarity of the theory, we constrain the parameters of the scalar potential for the first time at next-to-leading order in perturbation theory. We also derive new conditions guaranteeing the stability of the potential. We use the HEPfit package to single out the viable parameter regions at the electroweak scale and test the stability of the renormalization group evolution up to the multi-TeV region. Additionally, we set upper limits on the scalar mass splittings. All results are given for both cases, with and without a second scalar color singlet.

17 pages, 5 figures, to be published in Chinese Physics C

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Cited by in corpus (11)

• $\text{HEPfit}$: a Code for the Combination of Indirect and Direct Constraints on High Energy Physics Models
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• Active learning BSM parameter spaces
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• Low scale trinification symmetry through effects of dimension-5 operators in $E_6$ grand unified theory with and without supersymmetry