/ hep-ex CMS-SMP-16-018

Electroweak production of two jets in association with a Z boson in proton-proton collisions at $\sqrt{s}=$ 13 TeV

Abstract: A measurement of the electroweak (EW) production of two jets in association with a Z boson in proton-proton collisions at $\sqrt{s} =$ 13 TeV is presented, based on data recorded in 2016 by the CMS experiment at the LHC corresponding to an integrated luminosity of 35.9 fb$^{-1}$. The measurement is performed in the $\ell\ell\mathrm{jj}$ final state with $\ell$ including electrons and muons, and the jets j corresponding to the quarks produced in the hard interaction. The measured cross section in a kinematic region defined by invariant masses $m_{\ell\ell} >$ 50 GeV, $m_{\mathrm{jj}} >$ 120 GeV, and transverse momenta $p_{\mathrm{T j}} >$ 25 GeV is $\sigma_\mathrm{EW}(\ell\ell\mathrm{jj})=$ 552 $\pm$ 19 (stat) $\pm$ 55 (syst) fb, in agreement with leading-order standard model predictions. The final state is also used to perform a search for anomalous trilinear gauge couplings. No evidence is found and limits on anomalous trilinear gauge couplings associated with dimension-six operators are given in the framework of an effective field theory. The corresponding 95% confidence level intervals are $-2.6 < c_{WWW}/\Lambda^2 < 2.6$ TeV$^{-2}$ and $-8.4 < c_{W}/\Lambda^2 < 10.1$ TeV$^{-2}$. The additional jet activity of events in a signal-enriched region is also studied, and the measurements are in agreement with predictions.

Note: *Temporary entry*; Submitted to Eur. Phys. J. C. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SMP-16-018/ (CMS Public Pages)

Total numbers of views: 425
Numbers of unique views: 270