ATL-PHYS-PROC-2016-035
Acta Phys.Polon. B47 (2016) 1713-1721

by: Richter, Stefan (CERN)

Abstract:
The $\textit{ZZ}$ production cross section in proton–proton collisions at 13 TeV center-of-mass energy is measured using 3.2 fb$^{-1}$ of data recorded with the ATLAS detector at the Large Hadron Collider. The considered $\textit{Z}$ boson candidates decay to an electron or muon pair of mass 66–116 GeV. The cross section is measured to be 29.7$^{+3.9}_{-3.6}$(stat.)$^{+1.0}_{-0.8}$(syst.)$^{+1.7}_{-1.3}$(lumi.) fb in a fiducial phase space reflecting the detector acceptance. It is also extrapolated to a total phase space for $\textit{Z}$ bosons in the same mass range and of all decay modes, giving 16.7$^{+2.2}_{-2.0}$(stat.)$^{+0.9}_{-0.7}$(syst.)$^{+1.0}_{-0.7}$(lumi.) pb. The results agree with Standard Model predictions. Motivations for the measurement are presented and near-future prospects discussed.