MEASUREMENT OF ELECTROWEAK PRODUCTION OF TWO JETS IN ASSOCIATION WITH A Z BOSON IN PROTON–PROTON COLLISIONS AT √S=8TEVстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 26 августа 2016 г.
Аннотация:The purely electroweak (EW) cross section for the production of two jets in association with a Z boson, in proton–proton collisions at √s=8TeV , is measured using data recorded by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 19.7 fb-1 . The electroweak cross section for the ℓℓjj final state (with ℓ=e or μ and j representing the quarks produced in the hard interaction) in the kinematic region defined by Mℓℓ>50 GeV , Mjj>120 GeV , transverse momentum pTj>25 GeV , and pseudorapidity |ηj|<5 , is found to be σEW(ℓℓjj)=174±15(stat)±40(syst)\,fb , in agreement with the standard model prediction. The associated jet activity of the selected events is studied, in particular in a signal-enriched region of phase space, and the measurements are found to be in agreement with QCD predictions.