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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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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Title: 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
Author(s):
Aaboud, M.;
Aad, G.;
Abbott, B.;
Abdinov, O.;
Abeloos, B.;
Abidi, S. H.;
AbouZeid, O. S.;
Izen, Joseph M.;
Meirose, Bernhard;
Reeves, Kendall;
Izen, Joseph M.;
Meirose, Bernhard;
Reeves, Kendall
Date Created: 2017-10-17
Item Type: article
Keywords: Show Keywords
Abstract: This 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.
Publisher: Springer Verlag
ISSN: 1126-6708
Source: Journal of High Energy Physics
Link to Related Resource: http://dx.doi.org/10.1007/JHEP10(2017)112
Persistent Link: http://hdl.handle.net/10735.1/6092
Bibliographic Citation: Aaboud, M., G. Aad, B. Abbott, et al. 2017. "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." Journal of High Energy Physics 10, doi:10.1007/JHEP10(2017)112
Terms of Use: CC BY 4.0 (Attribution)
©2017 CERN, for the ATLAS Collaboration

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CC BY 4.0 (Attribution) Except where otherwise noted, this item's license is described as CC BY 4.0 (Attribution)