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Searches for the Zγ decay mode of the Higgs boson and for new high-mass resonances in pp collisions at √s=13 TeV with the ATLAS detector

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dc.contributor.authorAaboud, M.
dc.contributor.authorAad, G.
dc.contributor.authorAbbott, B.
dc.contributor.authorAbdinov, O.
dc.contributor.authorAbeloos, B.
dc.contributor.authorAbidi, S.
dc.contributor.authorAbouZeid, O.
dc.contributor.authorAbraham, N.
dc.contributor.authorAbramowicz, H.
dc.contributor.authorAbreu, H.
dc.contributor.authorAbreu, R.
dc.contributor.authorAbulaiti, Y.
dc.contributor.authorAcharya, B.
dc.contributor.authorAdachi, S.
dc.contributor.authorAdamczyk, L.
dc.contributor.authorAdelman, J.
dc.contributor.authorAdersberger, M.
dc.contributor.authorAdye, T.
dc.contributor.authorAffolder, A.
dc.contributor.authorAgatonovic-Jovin, T.
dc.contributor.authoret al.
dc.date.issued2017
dc.description.abstractThis article presents searches for the Zγ decay of the Higgs boson and for narrow high-mass resonances decaying to Zγ, exploiting Z boson decays to pairs of electrons or muons. The data analysis uses 36.1 fb−1 of pp collisions at s√=13 recorded by the ATLAS detector at the CERN Large Hadron Collider. The data are found to be consistent with the expected Standard Model background. The observed (expected — assuming Standard Model pp → H → Zγ production and decay) upper limit on the production cross section times the branching ratio for pp → H → Zγ is 6.6. (5.2) times the Standard Model prediction at the 95% confidence level for a Higgs boson mass of 125.09 GeV. In addition, upper limits are set on the production cross section times the branching ratio as a function of the mass of a narrow resonance between 250 GeV and 2.4 TeV, assuming spin-0 resonances produced via gluon-gluon fusion, and spin-2 resonances produced via gluon-gluon or quark-antiquark initial states. For high-mass spin-0 resonances, the observed (expected) limits vary between 88 fb (61 fb) and 2.8 fb (2.7 fb) for the mass range from 250 GeV to 2.4 TeV at the 95% confidence level.
dc.description.statementofresponsibilityM. Aaboud, G. Aad, B. Abbott, O. Abdinov, Paul D. Jackson … Martin White … et al. (ATLAS Collaboration)
dc.identifier.citationJournal of High Energy Physics (JHEP), 2017; 2017(10):112-51-112-51
dc.identifier.doi10.1007/JHEP10(2017)112
dc.identifier.issn1126-6708
dc.identifier.issn1029-8479
dc.identifier.orcidJackson, P. [0000-0002-0847-402X]
dc.identifier.orcidWhite, M. [0000-0001-5474-4580]
dc.identifier.urihttp://hdl.handle.net/2440/114934
dc.language.isoen
dc.publisherSpringer
dc.rights© The Author(s) 2017. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
dc.source.urihttps://doi.org/10.1007/jhep10(2017)112
dc.subjectHadron-Hadron scattering (experiments); Higgs physics
dc.titleSearches for the Zγ decay mode of the Higgs boson and for new high-mass resonances in pp collisions at √s=13 TeV with the ATLAS detector
dc.title.alternativeSearches for the Zgamma decay mode of the Higgs boson and for new high-mass resonances in pp collisions at root s=13 TeV with the ATLAS detector
dc.typeJournal article
pubs.publication-statusPublished

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