Abstract
The LHC Higgs data is showing a gradual inclination towards the SM result and realization of an SM-like limit becomes essential for BSM scenarios to survive. Considering the accuracy that can be achieved in future colliders, BSMs that acquire the alignment limit with an SM-like Higgs boson coupling can surpass others in the long run. Using a convenient parametrization, we demonstrate that the alignment limit for CP-conserving 3HDMs takes on the same analytic structure as that in the case of 2HDMs. Using the example of a $Z_3$-symmetric 3HDM, we illustrate how such alignment conditions can be efficiently implemented for numerical analysis in a realistic scenario.
Highlights
In the post-Higgs discovery era, the absence of any direct sign of new physics (NP) at the LHC has already kept many beyond the Standard Model (BSM) scenarios at bay
In anticipation that the LHC Higgs data will continue to incline towards the standard model (SM) expectations with increasing accuracy, those BSM scenarios which can deliver a SM-like Higgs in a certain alignment limit will have an upper hand in the future survival race
We have presented a recipe for recovering a SM-like Higgs boson with a mass 125 GeV from the 3HDM scalar spectrum
Summary
In the post-Higgs discovery era, the absence of any direct sign of new physics (NP) at the LHC has already kept many beyond the Standard Model (BSM) scenarios at bay. Deviations in the observed Higgs signal strengths from their respective SM values seem to have been significantly reduced with the increased sensitivity at the LHC Run II [1,2]. It is still possible for BSM scenarios to be hiding behind the curtain, camouflaging themselves with a SMlike Higgs. In such models, the 125 GeV scalar observed at the LHC is only the first to appear in a series of many others to follow.
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