Publication Date:
2018-09-01
Description:
Charged Higgs bosons produced either in top-quark decays or in association with a top-quark, subsequently decaying via H ± → τ ± ν τ , are searched for in 36.1 fb−1 of proton-proton collision data at $$ sqrt{s}=13 $$ s = 13 TeV recorded with the ATLAS detector. Depending on whether the top-quark produced together with H ± decays hadronically or leptonically, the search targets τ+jets and τ+lepton final states, in both cases with a hadronically decaying τ-lepton. No evidence of a charged Higgs boson is found. For the mass range of $$ {m}_{H^{pm }} $$ m H ± = 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 $$ mathrm{mathcal{B}}left({H}^{pm}o {au}^{pm }{
u}_{au}
ight) $$ ℬ H ± → τ ± ν τ in the range 4.2–0.0025 pb. In the mass range 90–160 GeV, assuming the Standard Model cross-section for $$ toverline{t} $$ t t ¯ production, this corresponds to upper limits between 0.25% and 0.031% for the branching fraction $$ mathrm{mathcal{B}}left(to b{H}^{pm}
ight)imes mathrm{mathcal{B}}left({H}^{pm}o {au}^{pm }{
u}_{au}
ight) $$ ℬ t → b H ± × ℬ H ± → τ ± ν τ .
Print ISSN:
1126-6708
Electronic ISSN:
1029-8479
Topics:
Physics
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