Muon g-2 and a type-X two Higgs doublet scenario: some studies in high-scale validity

Abstract

We study the high-scale validity of a Type-X two Higgs doublet scenario which provides an explanation of the observed value of muon $(g-2)$. This region admits of a pseudoscalar physical state, which is well below the observed 125-GeV scalar in mass. A second neutral scalar particle can be both above and below 125 GeV in such a scenario. Admissible regions in the parameter space are obtained by using the most recent data on muon $(g-2)$, theoretical constraints such as low-scale perturbativity and vacuum stability, and also all experimental constraints, including the available LHC results. Among other things, both the aforesaid orders of CP-even neutral scalar masses are included in our benchmark studies. Two-loop renormalisation group equations are used to predict the values of various couplings at high scales, and the regions in the space spanned by low-scale parameters, which retain perturbative unitarity as well as vacuum stability upto various scales are identified. We thus conclude that such a scenario, while successfully explaining the observed muon $(g-2)$, can be valid upto energy scales ranging from $10^4$ GeV to the Planck scale, thus opening up directions of thought on its ultraviolet completion.

46 pages, 27 figures

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Cited by in corpus (10)

• Two-Higgs-doublet models in light of current experiments: a brief review
• Likelihood analysis of the flavour anomalies and $g-2$ in the general two Higgs doublet model
• Light scalars within the $\mathcal{C}\mathcal{P}$-conserving Aligned-two-Higgs-doublet model
• General Remarks on the One-loop Contributions to the Muon Anomalous Magnetic Moment
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