Title
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Observation of top quark pairs produced in association with a vector boson in pp collisions at =8 TeV
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Author
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Abstract
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Measurements of the cross sections for top quark pairs produced in association with a W or Z boson are presented, using 8 TeV pp collision data corresponding to an integrated luminosity of 19.5 fb(-1), collected by the CMS experiment at the LHC. Final states are selected in which the associated W boson decays to a charged lepton and a neutrino or the Z boson decays to two charged leptons. Signal events are identified by matching reconstructed objects in the detector to specific final state particles from t (t) over barW or t (t) over barZ decays. The t (t) over barW cross section is measured to be 382(-102)(+117) fb with a significance of 4.8 standard deviations from the background-only hypothesis. The t (t) over barZ cross section is measured to be 242(-55)(+65) fb with a significance of 6.4 standard deviations from the background-only hypothesis. These measurements are used to set bounds on five anomalous dimension-six operators that would affect the t (t) over barW and t (t) over barZ cross sections. |
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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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2016
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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/JHEP01(2016)096
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Volume/pages
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1
(2016)
, 55 p.
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Article Reference
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096
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ISI
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000370438700001
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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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