Measurement of electroweak production of two jets in association with a Z boson in proton-proton collisions at root s=8 TeV
Type :
Article
Publication Status :
published
Access :
restrictedAccess
Abstract
The purely electroweak (EW) cross section for the production of two jets in association with a Z boson, in proton–proton collisions at s√=8TeVs=8TeV , is measured using data recorded by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 19.7 fb-1fb-1 . The electroweak cross section for the ℓℓjjℓℓjj final state (with ℓ=eℓ=e or μμ and j representing the quarks produced in the hard interaction) in the kinematic region defined by Mℓℓ>50Mℓℓ>50 GeVGeV , Mjj>120Mjj>120 GeVGeV , transverse momentum pTj>25pTj>25 GeVGeV , and pseudorapidity |ηj|<5|ηj|<5 , is found to be σEW(ℓℓjj)=174±15(stat)±40(syst)\,fbσEW(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.
Source :
European Physical Journal C
Date :
2015-02
Volume :
75
Issue :
2
Publisher :
Springer Nature
URI
http://hdl.handle.net/10679/4379http://link.springer.com/article/10.1140/epjc/s10052-014-3232-5
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