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Z3 symmetric inert ( 2+1 )-Higgs-doublet model

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We introduce a three-Higgs doublet model (3HDM) with two inert (or dark) scalar doublets and an active Higgs one, hence termed $\mathrm{I}(2+1)\mathrm{HDM}$, in the presence of a discrete ${Z}_{3}$ symmetry… Click to show full abstract

We introduce a three-Higgs doublet model (3HDM) with two inert (or dark) scalar doublets and an active Higgs one, hence termed $\mathrm{I}(2+1)\mathrm{HDM}$, in the presence of a discrete ${Z}_{3}$ symmetry acting upon the three doublet fields. We show that such a construct yields a dark matter (DM) sector with two mass-degenerate states of opposite $CP$ quantum number, both of which contribute to DM dynamics, which we call ``hermaphrodite DM,'' distinguishable from a (single) complex DM candidate. We show that the relic density contributions of both states are equal, saturating the observed relic density compliant with (in)direct searches for DM as well as other experimental data impinging on both the dark and Higgs sectors of the model, chiefly, in the form of electroweak precision observables, Standard Model-like Higgs boson measurements at the Large Hadron Collider and void searches for additional (pseudo)scalar states at the CERN machine and previous colliders.

Keywords: higgs doublet; inert higgs; symmetric inert; doublet model

Journal Title: Physical Review D
Year Published: 2021

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