Abstract
A search is presented for new particles in an extension to the Standard Model that includes a heavy Higgs boson (), an intermediate charged Higgs-boson pair (), and a light Higgs boson (). The analysis searches for events involving the production of a single heavy neutral Higgs boson which decays to the charged Higgs boson and a boson, where the charged Higgs boson subsequently decays into a boson and the lightest neutral Higgs boson decaying to a bottom–antibottom-quark pair. Such a cascade results in a -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 , collected by the ATLAS detector in proton-proton collisions at 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 and masses, with fixed at 125 GeV.
- Received 6 December 2013
DOI:https://doi.org/10.1103/PhysRevD.89.032002
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© 2014 CERN, for the ATLAS Collaboration