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Title
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Measurement of the cross section for electroweak production of a Z boson, a photon and two jets in proton-proton collisions at √s=13TeV and constraints on anomalous quartic couplings
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Author
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Institution/Organisation
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CMS Collaboration
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Abstract
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| A measurement is presented of the cross section for electroweak production of a Z boson and a photon in association with two jets (Z gamma jj) in proton-proton collisions. The Z boson candidates are selected through their decay into a pair of electrons or muons. The process of interest, electroweak Z gamma jj production, is isolated by selecting events with a large dijet mass and a large pseudorapidity gap between the two jets. The measurement is based on data collected at the CMS experiment at root s = 13 TeV, corresponding to an integrated luminosity of 35.9 fb(-1). The observed significance of the signal is 3.9 standard deviations, where a significance of 5.2 standard deviations is expected in the standard model. These results are combined with published results by CMS at root s = 8 TeV, which leads to observed and expected respective significances of 4.7 and 5.5 standard deviations. From the 13 TeV data, a value is obtained for the signal strength of electroweak Z gamma jj production and bounds are given on quartic vector boson interactions in the framework of dimension-eight effective field theory operators. |
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Language
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English
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Source (journal)
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Journal of high energy physics. - Bristol
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Publication
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Bristol
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2020
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ISSN
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1126-6708
1029-8479
[online]
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DOI
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10.1007/JHEP06(2020)076
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Volume/pages
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6
(2020)
, 42 p.
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Article Reference
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76
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ISI
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000540141000001
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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