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Journal Articles Physical Review D Year : 2014

Search for a multi-Higgs-boson cascade in WWbb events with the ATLAS detector in pp collisions at sqrt(s) = 8 TeV

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G. Aad
E. Augé
D. Rousseau
Zhiqing Zhang
  • Function : Author
  • PersonId : 829631
S. Calvet
Y. Coadou
N. Berger
C. Goy
T. Hryn'Ova

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, collected by the ATLAS detector in proton--proton collisions at sort(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 pb to 43 pb as a function of H0 and H+- masses, with m(h0) fixed at 125 GeV.

Dates and versions

in2p3-00915578 , version 1 (09-12-2013)

Identifiers

Cite

G. Aad, S. Albrand, J. Brown, Q. Buat, B. Clement, et al.. Search for a multi-Higgs-boson cascade in WWbb events with the ATLAS detector in pp collisions at sqrt(s) = 8 TeV. Physical Review D, 2014, 89, pp.032002. ⟨10.1103/PhysRevD.89.032002⟩. ⟨in2p3-00915578⟩
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