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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 | Authors: | Santos, S. P. Amor dos Fiolhais, M. C. N. Galhardo, B. Veloso, F. Wolters, H. ATLAS Collaboration |
Keywords: | Hadron-Hadron scattering (experiments); Higgs physics | Issue Date: | 2017 | Publisher: | Springer Nature | Serial title, monograph or event: | Journal of High Energy Physics | Volume: | 2017 | Issue: | 10 | Abstract: | This article presents searches for the Z decay of the Higgs boson and for narrow high-mass resonances decaying to Z , exploiting Z boson decays to pairs of electrons or muons. The data analysis uses 36.1 fb1 of pp collisions at p 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 ! Z production and decay) upper limit on the production cross section times the branching ratio for pp ! H ! Z is 6.6. (5.2) times the Standard Model prediction at the 95% con dence 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 gluongluon 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% con dence level. | URI: | https://hdl.handle.net/10316/108236 | DOI: | 10.1007/JHEP10(2017)112 | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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Searches-for-the-Z-decay-mode-of-the-Higgs-boson-and-for-new-highmass-resonances-in-pp-collisions-at-s13-TeV-with-the-ATLAS-detectorJournal-of-High-Energy-Physics.pdf | 1.73 MB | Adobe PDF | View/Open |
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