A New Avenue to Charged Higgs Discovery in Multi-Higgs Models

Abstract

Current searches for the charged Higgs at the LHC focus only on the $\tau \nu$, $cs$, and $tb$ final states. Instead, we consider the process $pp\to \Phi \to W^{\pm }{H}^{\mp }\to W^{+}{W}^{-}A$ where $\Phi$ is a heavy neutral Higgs boson, $H^{\pm }$ is a charged Higgs boson, and $A$ is a light Higgs boson, with mass either below or above the $b\bar{b}$ threshold. The cross-section for this process is typically large when kinematically open since $H^{\pm }\to W^{\pm }A$ can be the dominant decay mode of the charged Higgs. The final state we consider has two leptons and missing energy from the doubly leptonic decay of the $W^{+}{W}^{-}$ and possibly additional jets; it is therefore constrained by existing SM Higgs searches in the $W^{+}{W}^{-}$ channel. We extract these constraints on the cross-section for this process as a function of the masses of the particles involved. We also apply our results specifically to a type-II two Higgs doublet model with an extra Standard-Model-singlet and obtain new and powerful constraints on $m_{H^{\pm }}$ and $\tan \beta$. We point out that a slightly modified version of this search, with more dedicated cuts, could be used to possibly discover the charged Higgs, either with existing data or in the future.

38 pages, 14 figures

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• Probing the $\mu \nu$SSM with light scalars, pseudoscalars and neutralinos from the decay of a SM-like Higgs boson at the LHC
• Boosted Dark Matter Quarrying at Surface Neutrino Detectors
• Effects of vectorlike leptons on $h\to 4\ell$ and the connection to the muon g-2 anomaly
• Theoretical Constraints on Additional Higgs Bosons in Light of the 126 GeV Higgs
• New constraints and discovery potential for Higgs to Higgs cascade decays through vectorlike leptons
• Exotic Decays Of A Heavy Neutral Higgs Through HZ/AZ Channel
• New decay modes of heavy Higgs bosons in a two Higgs doublet model with vectorlike leptons
• Contributions of flavor violating couplings of a Higgs boson to $pp\to WW$
• Exotic Higgs Decay via Charged Higgs
• Charged Higgs Discovery in the W plus "Dark" Vector Boson Decay Mode
• Leptonic cascade decays of a heavy Higgs boson through vectorlike leptons at the LHC
• Charged Higgs Pair Production at the LHC as a Probe of the Top-Seesaw Assisted Technicolor Models