Search for an Additional, Heavy Higgs Boson in the H → ZZ Decay Channel at √s̅ = 8 TeV in pp Collision Data with the ATLAS Detector

dc.contributor.VIAF250674117 (Izen, JM)en_US
dc.contributor.VIAF250674117 (Izen, JM)
dc.contributor.authorAad, G.en_US
dc.contributor.authorAbbott, B.en_US
dc.contributor.authorAbdallah, J.en_US
dc.contributor.authorAbdinov, O.en_US
dc.contributor.authorAben, R.en_US
dc.contributor.authorAbolins, M.en_US
dc.contributor.authorAbouZeid, O. S.en_US
dc.contributor.authorIzen, Joseph M.en_US
dc.contributor.authorLeyton, Michaelen_US
dc.contributor.authorMeirose, Bernharden_US
dc.contributor.authorNamasivayam, Harisankaren_US
dc.contributor.authorReeves, Kendallen_US
dc.contributor.authorATLAS Collaborationen_US
dc.contributor.utdAuthorIzen, Joseph M.en_US
dc.contributor.utdAuthorLeyton, Michaelen_US
dc.contributor.utdAuthorMeirose, Bernharden_US
dc.contributor.utdAuthorNamasivayam, Harisankaren_US
dc.contributor.utdAuthorReeves, Kendallen_US
dc.description.abstractA search is presented for a high-mass Higgs boson in the H → ZZ → ℓ+ℓ−ℓ+ℓ−, H → ZZ → ℓ+ℓ−νν̅ , H → ZZ → ℓ+ℓ−qq̅, and H → ZZ → νν̅qq̅ decay modes using the ATLAS detector at the CERN Large Hadron Collider. The search uses proton–proton collision data at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 20.3 fb⁻¹. The results of the search are interpreted in the scenario of a heavy Higgs boson with a width that is small compared with the experimental mass resolution. The Higgs boson mass range considered extends up to 1 TeV for all four decay modes and down to as low as 140 GeV, depending on the decay mode. No significant excess of events over the Standard Model prediction is found. A simultaneous fit to the four decay modes yields upper limits on the production cross-section of a heavy Higgs boson times the branching ratio to Z boson pairs. 95% confidence level upper limits range from 0.53 pb at m_H = 195 GeV to 0.008 pb at m_H = 950 GeV for the gluon-fusion production mode and from 0.31 pb at m_H = 195 GeV to 0.009 pb at m_H = 950 GeV for the vector-boson-fusion production mode. The results are also interpreted in the context of Type- I and Type-II two-Higgs-doublet models.en_US
dc.identifier.bibliographicCitationAad, G., B. Abbott, J. Abdallah, O. Abdinov, et al. 2016. "Search for an additional, heavy Higgs boson in the H → ZZ decay channel at √s̅ = 8 TeV in pp collision data with the ATLAS detector." European Physical Journal C 76(1), doi:10.1140/epjc/s10052-015-3820-zen_US
dc.rightsCC BY 4.0 (Attribution)en_US
dc.rights©2016 CERN, for the ATLAS Collaborationen_US
dc.sourceEuropean Physical Journal C
dc.subjectStandard Modelen_US
dc.subjectHadron collidersen_US
dc.subjectHiggs bosonsen_US
dc.subjectProton-proton interactionsen_US
dc.subjectLarge Hadron Collider (France and Switzerland)en_US
dc.subjectBranching ratios (Nuclear physics)en_US
dc.titleSearch for an Additional, Heavy Higgs Boson in the H → ZZ Decay Channel at √s̅ = 8 TeV in pp Collision Data with the ATLAS Detectoren_US


Original bundle

Now showing 1 - 1 of 1
Thumbnail Image
3.5 MB
Adobe Portable Document Format