Tau-jet signatures of vectorlike quark decays to heavy charged and neutral Higgs bosons

Abstract

We study $4b+2\tau$ and $4b+1\tau$ signatures of heavy neutral and charged Higgs bosons originating from cascade decays of pair-produced new quarks. Decays of vectorlike quarks through heavy Higgses can easily dominate in the two Higgs doublet model of type-II, and the studied signatures are common to many possible decay chains. We design search strategies for these final states and discuss the mass ranges of heavy Higgs bosons and new quarks that can be explored at the Large Hadron Collider as functions of branching ratios in a model independent way. We further combine the results with a similar study focusing on decays which lead to a $6b$ final state and interpret the sensitivity to charged and neutral Higgs bosons and vectorlike quarks in the type-II two Higgs doublet model. We find that the LHC reach for their masses extends to well above 2 TeV in the case of an SU(2) doublet quark and to at least 1.8 TeV for a bottom-like SU(2) singlet quark in the whole range of $\tan \beta$ between 1 and 50.

19 pages, 10 figures; v2: matches published version

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Cited by in corpus (5)

• Roadmap to explore vectorlike quarks decaying to a new scalar or pseudoscalar
• Discovery prospects of a vectorlike top partner decaying to a singlet boson
• Machine learning-enhanced search for a vectorlike singlet $B$ quark decaying to a singlet scalar or pseudoscalar
• Exploring maverick top partner decays at the LHC
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