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Search for a multi-Higgs-boson cascade in $W^{+}W^{-}b\bar{b}$ events with the ATLAS detector in $\mathit{pp}$ collisions at $\sqrt{s}=8$ TeV
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dc.type
JournalArticle
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dc.abstract.en
A search is presented for new particles in an extension to the Standard Model that includes a heavy Higgs boson ($H^{0}$), an intermediate charged Higgs-boson pair ($H^{\pm}$), and a light Higgs boson ($h^{0}$). The analysis searches for events involving the production of a single heavy neutral Higgs boson which decays to the charged Higgs boson and a W boson, where the charged Higgs boson subsequently decays into a W boson and the lightest neutral Higgs boson decaying to a bottom–antibottom-quark pair. Such a cascade results in a W-boson pair and a bottom–antibottom-quark pair in the final state. Events with exactly one lepton, missing transverse momentum, and at least four jets are selected from a data sample corresponding to an integrated luminosity of 20.3 fb$^{-1}$, collected by the ATLAS detector in proton-proton collisions at $\sqrt{s}=8$ TeV at the LHC. The data are found to be consistent with Standard Model predictions, and 95% confidence-level upper limits are set on the product of cross section and branching ratio. These limits range from 0.065 to 43 pb as a function of $H^{0}$ and $H^{\pm}$ masses, with $m_{h^{0}}$ fixed at 125 GeV.
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dc.description.volume
89
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dc.description.number
3
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dc.description.publication
1,5
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dc.identifier.doi
10.1103/PhysRevD.89.032002
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dc.identifier.eissn
1550-2368
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dc.title.journal
Physical Review. D, Particles, Fields, Gravitation, and Cosmology
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dc.contributor.institution
ATLAS Collaboration
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dc.language.container
eng
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dc.affiliation
Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego
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dc.subtype
Article
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dc.identifier.articleid
032002
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dc.rights.original
CC-BY; inne; ostateczna wersja wydawcy; w momencie opublikowania; 0