Exploring Wrong Sign Scenarios in the Yukawa-Aligned 2HDM

Abstract

We discuss scenarios with wrong-sign (WS) Yukawa couplings for the discovered Higgs boson in the Yukawa-aligned two Higgs doublet model. In the WS scenario, Yukawa couplings for down-type quarks and/or charged leptons have an opposite sign as compared to those of the Higgs boson in the standard model, which can be consistent with current flavour data and the Higgs signal strengths. The phenomenology of additional Higgs bosons in such a scenario can be significantly different from that with right-sign Yukawa couplings, mainly due to a larger Higgs boson mixing to be required in the wrong-sign case. We show the parameter space which is excluded or explored by direct searches for the additional Higgs bosons at the current and high-luminosity LHC under the constraints from perturbative unitarity and vacuum stability. In particular, we find that most of the parameter space is explored in the WS scenario with the Type-X (lepton specific) Yukawa interaction which is a special case of the Yukawa alignment realized by imposing a softly-broken ${\mathbb{Z}}_2$ symmetry. We propose that multi-Higgs events from pair productions of the additional Higgs bosons can be the smoking gun signature to probe the WS scenario, and give the expected number of events at the high-luminosity LHC.

v2: Published in JHEP

References in corpus (25)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• FeynRules - Feynman rules made easy
• SusHi: A program for the calculation of Higgs production in gluon fusion and bottom-quark annihilation in the Standard Model and the MSSM
• Models of Yukawa interaction in the two Higgs doublet model, and their collider phenomenology
• Limiting two-Higgs-doublet models
• Fingerprinting the extended Higgs sector using one-loop corrected Higgs boson couplings and future precision measurements
• New Barr-Zee contributions to $(\mathbf{g}-2{)}_{\mu }$ in two-Higgs-doublet models
• Fingerprinting non-minimal Higgs sectors
• Constraints on and future prospects for Two-Higgs-Doublet Models in light of the LHC Higgs signal
• $h\to Z\gamma$ in the complex two Higgs doublet model
• Lepton-Specific Two-Higgs Doublet Model: Experimental Constraints and Implication on Higgs Phenomenology
• Light MSSM Higgs boson scenario and its test at hadron colliders
• Global fits in the Aligned Two-Higgs-Doublet model
• Electroweak baryogenesis in aligned two Higgs doublet models
• Aligned CP-violating Higgs sector canceling the electric dipole moment
• The forgotten channels: charged Higgs boson decays to a $W^{\pm }$ and a non-SM-like Higgs boson
• Compatibility of muon $g-2$, $W$ mass anomaly in type-X 2HDM
• New benchmark scenarios of electroweak baryogenesis in aligned two Higgs double models
• Reconstructing a light pseudoscalar in the Type-X Two Higgs Doublet Model
• Same sign trilepton as signature of charged Higgs in two Higgs doublet model
• Probing double-aligned two Higgs doublet models at LHC
• Testing aligned CP-violating Higgs sector at future lepton colliders
• Generalized 2HDM with wrong-sign lepton Yukawa coupling, in light of $g_{\mu }-2$ and lepton flavor violation at the future LHC
• Next-to-leading order corrections to decays of the heavier CP-even Higgs boson in the two Higgs doublet model
• Radiative corrections to decay branching ratios of the CP-odd Higgs boson in two Higgs doublet models

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