Measurement of electroweak production of two jets in association with a Z boson in proton–proton collisions at √s=8TeV

Khachatryan, V. and Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Bergauer, T. and Filipovic, Nicolas and Bencze, György and Hajdú, Csaba and Hidas, Pál and Horváth, Dezső and Siklér, Ferenc and Veszprémi, Viktor and Vesztergombi, György and Zsigmond, Anna Júlia and Karancsi, János and Molnár, József and Pálinkás, József and Trócsányi, Zoltán and Ujvári, Balázs and Veres, Gábor (2015) Measurement of electroweak production of two jets in association with a Z boson in proton–proton collisions at √s=8TeV. EUROPEAN PHYSICAL JOURNAL C, 75 (2). ISSN 1434-6044

Preview

Text 1410.3153.pdf Available under License Creative Commons Attribution. Download (1MB) | Preview

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 = 8 TeV, 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 ``jj final state (with ` = e or μ and j representing the quarks produced in the hard interaction) in the kinematic region defined by M`` > 50 GeV, Mjj > 120 GeV, transverse momentum pTj > 25 GeV, and pseudorapidity |ηj| < 5, is found to be σEW(``jj) = 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.

Actions (login required)

Edit Item