Search for a multi-Higgs-boson cascade in W[superscript +]W[superscript −]b[¯ over b] events with the ATLAS detector in pp collisions at √s = 8 TeV
A search is presented for new particles in an extension to the Standard Model that includes a heavy Higgs boson (H[superscript 0]), an intermediate charged Higgs-boson pair (H[superscript ±]), and a light Higgs boson (h[superscript 0]). The analysis searches for events involving the production of a...
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2014
|
| Online Access: | http://hdl.handle.net/1721.1/87742 https://orcid.org/0000-0002-7586-7253 |
| Summary: | A search is presented for new particles in an extension to the Standard Model that includes a heavy Higgs boson (H[superscript 0]), an intermediate charged Higgs-boson pair (H[superscript ±]), and a light Higgs boson (h[superscript 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[superscript −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 H[superscript 0] and H[superscript ±] masses, with m[subscript h]0 fixed at 125 GeV. |
|---|