Exotic Higgs Decay via Charged Higgs

Abstract

The most common search channel for heavy neutral Higgses in models with an extension of the Standard Model Higgs sector is $A/H^0\to \tau \tau$, which becomes ineffective when new decay modes of $A/H^0$ open. In this paper, we analyzed two such channels involving charged Higgses in the final states: $A/H^0\to W^{\pm }{H}^{\mp }$ and $H^0\to H^{+}{H}^{-}$. With the consequent decay of $H^{\pm }\to \tau \nu$, we found that the limits for $\sigma \times BR(gg\to A/H^0\to W^{\pm }{H}^{\mp })\times BR(H^{\pm }\to \tau \nu )$ vary from 30 to 10 fb for $m_{A/H^0}$ between 300 and 1000 GeV for 95% C.L. exclusion, and about 80 to 30 fb for 5$\sigma$ discovery. For $H^{+}{H}^{-}$ mode, 95% C.L. limits on $\sigma \times BR(gg\to H^0\to H^{+}{H}^{-})\times {BR}^2(H^{\pm }\to \tau \nu )$ vary from 9 to 4 fb for $m_{H^0}$ between 400 and 1000 GeV, while the 5$\sigma$ reach is about 20 to 10 fb. We further interpret the cross section limits in the Type II 2HDM parameter space. While $A\to W^{\pm }{H}^{\mp }$ offers great sensitivity in both $\sin (\beta -\alpha )$ versus $\tan \beta$ and $m_A$ versus $\tan \beta$ parameter space, $H^0\to H^{+}{H}^{-}$ can cover most of the parameter space for $H^0$. Reach in $H^0\to W^{\pm }{H}^{\mp }$ is more limited, especially for $m_{H^0}>2m_{H^{\pm }}$. It is, however, complementary to $H^0\to H^{+}{H}^{-}$ when $BR(H^0\to H^{+}{H}^{-})$ is accidentally suppressed.

19 pages, 11 figures, version appear in JHEP

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Cited by in corpus (8)

• Anatomy of Exotic Higgs Decays in 2HDM
• Hierarchical vs Degenerate 2HDM: The LHC Run 1 Legacy at the Onset of Run 2
• Heavy Higgs boson decays in the alignment limit of the 2HDM
• Complementarity of the future $e^{+}{e}^{-}$ colliders and gravitational waves in the probe of complex singlet extension to the Standard Model
• Exotic Higgs Decays in Type-II 2HDMs at the LHC and Future 100 TeV Hadron Colliders
• LHC searches for heavy neutral Higgs bosons with a top jet substructure analysis
• Seeking Heavy Higgs Bosons through Cascade Decays
• Charged Higgs bosons in the NMSSM under current LHC constraints