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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
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
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Number of Authors: 2935
2014 (English)In: Physical Review D, ISSN 1550-7998, Vol. 89, no 3, 032002- p.Article in journal (Refereed) Published
Abstract [en]

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.
Keyword [en]
Parton Distributions, Standard Model, Pair Production, LHC, Physics, Supersymmetry, Particle
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-144198DOI: 10.1103/PhysRevD.89.032002ISI: 000332161700001ScopusID: 2-s2.0-84896299227OAI: diva2:712217
Swedish Research Council

QC 20140414. Author count: 2935

Available from: 2014-04-14 Created: 2014-04-14 Last updated: 2014-04-14Bibliographically approved

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Jovicevic, JelenaKuwertz, EmmaLund-Jensen, BengtMorley, AnthonyStrandberg, Jonas
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Particle and Astroparticle PhysicsPhysics
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