Comprehensive study of the light charged Higgs boson in the type-I two-Higgs-doublet model

Abstract

In the type-I two-Higgs-doublet model, existing theoretical and experimental constraints still permit the light charged Higgs boson with a mass below the top quark mass. We present a complete roadmap for the light charged Higgs boson at the LHC through the comprehensive phenomenology study, focusing on the normal scenario where the lighter \textit{CP}-even Higgs boson is the observed Higgs boson. In type-I, it is challenging to simultaneously accommodate the light mass of the charged Higgs boson and the constraints from theory, electroweak precision data, Higgs data, $b\to s\gamma$, and direct search bounds. Consequently, the parameter space is extremely curtailed, which predicts somewhat definite phenomenological signatures. We find that the mass of the pseudoscalar Higgs boson, $M_A$, is the most crucial factor in the phenomenology of the charged Higgs boson. If $M_A$ is light, the charged Higgs boson decays mainly into $A{W}^{\pm }$. When $M_A$ is above the $A{W}^{\pm }$ threshold, the dominant decay mode is into ${\tau }^{\pm }\nu$. Over the whole viable parameter space, we study all the possible production and decay modes of charged Higgs bosons at the LHC, and suggest three efficient channels: (i) $pp\to H^{+}{H}^{-}\to [\tau \nu ][\tau \nu ]$; (ii) $pp\to HA/HH/AA\to H^{\pm }{W}^{\mp }{H}^{\pm }{W}^{\mp }\to [\tau \nu ][\tau \nu ]WW$; (iii) $pp\to H^{+}{H}^{-}\to [b\bar{b}W][b\bar{b}W]$. Based on the sophisticated signal-background analyses including detector simulation, we showed that the significance of the first final state is large, that of the second one is marginal around three, but the third one suffers from huge $t\bar{t}$ related backgrounds.

The final version to appear in PRD

References in corpus (15)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Pileup subtraction using jet areas
• The oblique parameters in multi-Higgs-doublet models
• Models of Yukawa interaction in the two Higgs doublet model, and their collider phenomenology
• HiggsSignals-2: Probing new physics with precision Higgs measurements in the LHC 13 TeV era
• Measurements of the Higgs boson width and anomalous HVV couplings from on-shell and off-shell production in the four-lepton final state
• Search for a 'stable alignment limit' in two Higgs-doublet models
• The forgotten channels: charged Higgs boson decays to a $W^{\pm }$ and a non-SM-like Higgs boson
• Type-X two Higgs doublet model in light of the muon $\mathbf{g}-2$: confronting Higgs and collider data
• New Discovery Modes for a Light Charged Higgs Boson at the LHC
• Same sign trilepton as signature of charged Higgs in two Higgs doublet model
• Probing double-aligned two Higgs doublet models at LHC
• New Light $H^{\pm }$ Discovery Channels at the LHC

Cited by in corpus (11)

• CDF $W$ boson mass and muon $g-2$ in type-X two-Higgs-doublet model with a Higgs-phobic light pseudoscalar
• Two-Higgs-doublet models in light of current experiments: a brief review
• Light Scalars at FASER
• Single charged Higgs boson production at the LHC
• Fermiophobic light Higgs boson in the type-I two-Higgs-doublet model
• P-even, CP-violating Signals in Scalar-Mediated Processes
• Discovery prospects of a light charged Higgs near the fermiophobic region of Type-I 2HDM
• The decay $A^0\to h^0{Z}^{(\ast )}$ in the inverted hierarchy scenario and its detection prospects at the Large Hadron Collider
• Disentangling the high and low cutoff scales via the trilinear Higgs couplings in the type-I two-Higgs-doublet model
• Constraint for a light charged Higgs boson and its neutral partners from top quark pairs at the LHC
• Constraining the CP4-invariant three-Higgs-doublet model via top quark decays