Measurement of electroweak production of two jets in association with a Z boson in proton-proton collisions at sqrt(s)= 8 TeV

Abstract : The purely electroweak (EW) cross section for the production of two jets in association with a Z boson, in proton-proton collisions at sqrt(s) = 8 TeV, is measured using data recorded by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 19.7 inverse femtobarns. The electroweak cross section for the lljj final state (with l = e or mu and j representing the quarks produced in the hard interaction) in the kinematic region defined by M[ll] > 50 GeV, M[jj] > 120 GeV, transverse momentum pt[j] > 25 GeV, and pseudorapidity abs(eta[j]) < 5, is found to be sigma[EW](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.
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European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2015, 75, pp.66. 〈10.1140/epjc/s10052-014-3232-5〉
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http://hal.in2p3.fr/in2p3-01162744
Contributeur : Dominique Girod <>
Soumis le : jeudi 11 juin 2015 - 11:58:03
Dernière modification le : jeudi 10 mai 2018 - 01:59:26

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V. Khachatryan, M. Besancon, F. Couderc, M. Dejardin, D. Denegri, et al.. Measurement of electroweak production of two jets in association with a Z boson in proton-proton collisions at sqrt(s)= 8 TeV. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2015, 75, pp.66. 〈10.1140/epjc/s10052-014-3232-5〉. 〈in2p3-01162744〉

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