Search for a multi-Higgs-boson cascade in $W^+W^−b\\barb$ events with the ATLAS detector in pp collisions at $\\sqrts = 8$ TeV
Journal
Physical Review
Journal Volume
D89
Journal Issue
3
Pages
032002
Date Issued
2014
Author(s)
Aad, Georges
Abstract
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 AE ), 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 ffiffi ffi s p 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 AE masses, with m h 0 fixed at 125 GeV.
Type
journal article