Search for a multi-Higgs-boson cascade in W(+)W(-)b(b)over-bar events with the ATLAS detector in pp collisions at root s=8 TeV
Number of Authors: 2935
2014 (English)In: Physical Review D, ISSN 1550-7998, Vol. 89, no 3, 032002- p.Article in journal (Refereed) Published
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-+/-), 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 root 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-0 and H-+/- masses, with m(h)o fixed at 125 GeV.
Place, publisher, year, edition, pages
2014. Vol. 89, no 3, 032002- p.
Parton Distributions, Standard Model, Pair Production, LHC, Physics, Supersymmetry, Particle
IdentifiersURN: urn:nbn:se:kth:diva-144198DOI: 10.1103/PhysRevD.89.032002ISI: 000332161700001ScopusID: 2-s2.0-84896299227OAI: oai:DiVA.org:kth-144198DiVA: diva2:712217
FunderSwedish Research Council
QC 20140414. Author count: 29352014-04-142014-04-142014-04-14Bibliographically approved