Current bounds on the Type-Z $Z_3$ three Higgs doublet model

Abstract

Type-Z models, where charged leptons, up type quarks, and down type quarks each couple to a different scalar, are only possible when there are three or more Higgs doublets. We consider the Type-Z three Higgs doublet model imposed by a softly broken $Z_3$ symmetry. We take into account all theoretical and experimental constraints, highlighting the importance of perturbative unitarity and bounded from below conditions that we develop here, and which have a strong impact on $B\to X_s\gamma$. Since there can be cancellations between the two charged Higgs in $B\to X_s\gamma$ (and in $h\to \gamma \gamma$), the lower bounds obtained on the charged Higgs masses are alleviated. We also discuss in detail the important physical differences between exact alignment and approximate alignment, and present some useful benchmark points.

32 pages, 23 Figures in PDF. v2: impact of BFB corrected, benchmarks added

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Cited by in corpus (12)

• BFB conditions on a class of symmetry constrained 3HDM
• Slight excess at 130 GeV in search for a charged Higgs boson decaying to a charm quark and a bottom quark at the Large Hadron Collider
• Search for a heavy charged Higgs boson decaying into a $W$ boson and a Higgs boson in final states with leptons and $b$-jets in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
• Combining Evolutionary Strategies and Novelty Detection to go Beyond the Alignment Limit of the $Z_3$ 3HDM
• Anomaly-free axion dark matter in three Higgs doublet model and its phenomenological implications
• Democratic three Higgs-doublet models: the custodial limit and wrong-sign Yukawa
• Fingerprinting the Type-Z three Higgs doublet models
• Lepton Flavor Specific Extended Higgs Model
• Loop induced $h\to \gamma \gamma ,Z\gamma ,gg$ decays in 3-Higgs doublet models
• Unearthing large pseudoscalar Yukawa couplings with Machine Learning
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• Tagging ultra-boosted jets at FCC-hh using machine learning techniques