Search for charged Higgs bosons decaying via $H^{\pm} \to \tau^{\pm}\nu_{\tau}$ in the $\tau$+jets and $\tau$+lepton final states with 36 fb$^{-1}$ of $pp$ collision data recorded at $\sqrt{s} = 13$ TeV with the ATLAS experiment

The ATLAS collaboration
JHEP 1809 (2018) 139, 2018

Abstract (data abstract)
CERN-LHC. This data presents the result of a search for charged Higgs bosons decaying via $H^{\pm}\to\tau^{\pm}\nu_{\tau}$ in 36 fb$^{-1}$ of $pp$ collision data recorded at $\sqrt{s} = 13$ TeV recorded with the ATLAS experiment. No evidence of a charged Higgs boson is found. For the mass range of $m_{H^{\pm}}$ = 90-2000 GeV, upper limits at the 95% confidence level are set on the production cross-section of the charged Higgs boson times the branching fraction $\mathrm{\cal{B}}(H^{\pm} \to \tau^{\pm}\nu_{\tau})$ in a range of 4.2-0.0025 pb. In the mass range 90-160 GeV, assuming the Standard Model cross-section for $t\bar{t}$ production, this corresponds to upper limits between 0.25% and 0.031% for the branching fraction $\mathrm{\cal{B}}(t\to bH^{\pm}) \times \mathrm{\cal{B}}(H^{\pm} \to \tau^{\pm}\nu_{\tau})$. The $\tau$+jets channel fiducial region is defined as: - At least one hadronic tau decay ($\tau_{\rm had-vis}$) - Choose $\tau_{\rm had-vis}$ with highest $p_{\rm T}$ satisfying Medium ID cut - $p_{\rm T}$($\tau_{\rm had-vis}$) > 40 GeV, |$\eta$($\tau_{\rm had-vis}$)| < 1.37 or 1.52 < |$\eta$($\tau_{\rm had-vis}$)| < 2.3 - No electrons or muons - At least three jets with $p_{\rm T}$ > 25 GeV, of which at least one is $b$-tagged - $E_{\rm T}^{\rm miss}$ > 150 GeV - $m_{\rm T}$($\tau_{\rm had-vis}$, $E_{\rm T}^{\rm miss}$) > 50 GeV The $\tau$+lepton channel fiducial region is defined as: - At least one hadronic tau decay ($\tau_{\rm had-vis}$) - Choose $\tau_{\rm had-vis}$ with highest $p_{\rm T}$ satisfying Medium ID cut - $p_{\rm T}$($\tau_{\rm had-vis}$) > 30 GeV, |$\eta$($\tau_{\rm had-vis}$)| < 1.37 or 1.52 < |$\eta$($\tau_{\rm had-vis}$)| < 2.3 - Exactly one light lepton (electron or muon) satisfying Tight ID cut - $p_{\rm T}$(e) > 30 GeV, |$\eta$(e)| < 1.37 or 1.52 < |$\eta$(e)| < 2.47 - $p_{\rm T}$($\mu$) > 30 GeV, |$\eta$($\mu$)| < 2.5 - At least one is $b$-tagged with $p_{\rm T}$ > 25 GeV - $E_{\rm T}^{\rm miss}$ > 50 GeV

  • Table 1

    Data from Figure 8a

    10.17182/hepdata.83355.v1/t1

    Observed and expected 95% CL exclusion limits on $\sigma(pp\to tbH^+)\times \mathrm{\cal{B}}(H^+\to\tau\nu)$ as a function of the charged Higgs boson mass...

  • Table 2

    Data from Figure 8b

    10.17182/hepdata.83355.v1/t2

    Observed and expected 95% CL exclusion limits on $\mathrm{\cal{B}}(t\to bH^+)\times\mathrm{\cal{B}}(H^+\to\tau\nu)$ as a function of the charged Higgs boson mass in...

  • Table 3

    Data from Figure 9

    10.17182/hepdata.83355.v1/t3

    Observed 95% CL exclusion contour in the tan$\beta$ - $m_H$ plane shown in the context of the hMSSM, for the...

  • Table 4

    Data from Figure 9

    10.17182/hepdata.83355.v1/t4

    Expected 95% CL exclusion contour in the tan$\beta$ - $m_H$ plane shown in the context of the hMSSM, for the...

  • Table 5

    Data from Auxiliary Figure 6

    10.17182/hepdata.83355.v1/t5

    Observed a95% CL exclusion contour in the tan$\beta$ - $m_H$ plane shown in the context of the $m_{H}^{mod-}$ scenario, for...

  • Table 6

    Data from Auxiliary Figure 6

    10.17182/hepdata.83355.v1/t6

    Expected 95% CL exclusion contour in the tan$\beta$ - $m_H$ plane shown in the context of the $m_{H}^{mod-}$ scenario, for...

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