New constraints and discovery potential for Higgs to Higgs cascade decays through vectorlike leptons

Abstract

One of the cleanest signatures of a heavy Higgs boson in models with vectorlike leptons is $H\to e_4^{\pm }{\ell }^{\mp }\to h{\ell }^{+}{\ell }^{-}$ which, in two Higgs doublet model type-II, can even be the dominant decay mode of heavy Higgses. Among the decay modes of the standard model like Higgs boson, $h$, we consider $b\bar{b}$ and $\gamma \gamma$ as representative channels with sizable and negligible background, respectively. We obtained new model independent limits on production cross section for this process from recasting existing experimental searches and interpret them within the two Higgs doublet model. In addition, we show that these limits can be improved by about two orders of magnitude with appropriate selection cuts immediately with existing data sets. We also discuss expected sensitivities with integrated luminosity up to 3 ab${}^{-1}$ and present a brief overview of other channels.

17 pages, 9 figures

References in corpus (9)

• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Big-Bang Nucleosynthesis
• Search for the $b\bar{b}$ decay of the Standard Model Higgs boson in associated $(W/Z)H$ production with the ATLAS detector
• Search for a CP-odd Higgs boson decaying to $Zh$ in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Survey of vector-like fermion extensions of the Standard Model and their phenomenological implications
• Measurements of fiducial and differential cross sections for Higgs boson production in the diphoton decay channel at $\sqrt{s}=8$ TeV with ATLAS
• Limits on Vectorlike Leptons from Searches for Anomalous Production of Multi-Lepton Events
• Effects of vectorlike leptons on $h\to 4\ell$ and the connection to the muon g-2 anomaly

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