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Search for a multi-Higgs-boson cascade in W+W−bb events with the ATLAS detector in pp collisions at √s=8 TeV
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ATLAS Collaboration (Including: Farrington, Sinead, Harrison, P. F., Janus, M., Jeske, C., Jones, G. (Graham), Martin, T. A. and Pianori, E.). (2014) Search for a multi-Higgs-boson cascade in W+W−bb events with the ATLAS detector in pp collisions at √s=8 TeV. Physical Review D (Particles, Fields, Gravitation and Cosmology), Volume 89 (Number 3). Article number 032002 . doi:10.1103/PhysRevD.89.032002
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WRAP_PhysRevD.89.032002.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution. Download (977Kb) | Preview |
Official URL: http://dx.doi.org/10.1103/PhysRevD.89.032002
Abstract
A search is presented for new particles in an extension to the Standard Model that includes a heavy Higgs boson (H0), an intermediate charged Higgs-boson pair (H±), and a light Higgs boson (h0). 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 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 H0 and H± masses, with mh0 fixed at 125 GeV.
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