Search for a multi-Higgs-boson cascade in <math display='inline'><mrow><msup><mrow><mi>W</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>W</mi></mrow><mrow><mo>-</mo></mrow></msup><mi>b</mi><

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 (<em>H</em>^&plusmn;), 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 <em>W</em> boson, where the charged Higgs boson subsequently decays into a <em>W</em> boson and the lightest neutral Higgs boson decaying to a bottom-antibottom-quark pair. Such a cascade results in a <em>W</em>-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. Lastly, these limits range from 0.065 to 43 pb as a function of <em>H</em>⁰ and <em>H</em>^&plusmn; masses, with m_h⁰ fixed at 125 GeV.. Authors: Aad, G.; Abajyan, T.; Abbott, B.; Abdallah, J.; Abdel Khalek, S.. DOE Contract: AC02-05CH11231. Subjects: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS