Measurements of ZZ Production Cross Section using four-lepton events and constraints on anomalous triple gauge couplings at $\sqrt{s}$ =13 TeV using the CMS detector at the CERN LHC

Studies of four-lepton production in proton-proton collisions, pp $\rightarrow$ (Z/$\gamma$$^{*}$)(Z/$\gamma$$^{*})$ $\rightarrow$ 4$\ell$, where $\ell$ = e or $\mu$, using data collected during 2016-2018 (Run II) are presented. The dataset corresponds to an integrated luminosity of 137 fb$^{-1}$ at a center-of-mass energy of 13 TeV, collected by the CMS detector at the LHC. All reported measurements use the 2$\ell$2$\ell$' final states, where $\ell$, $\ell$' = e or $\mu$. The total ZZ cross section for all events with two Z bosons in the mass range 60-120 GeV is measured and found to be $\sigma$(pp $\rightarrow$ ZZ) = 17.2 $\pm$ 0.3 (stat) $\pm$ 0.5 (syst) $\pm$ 0.4 (theo) $\pm$ 0.3 (lumi) pb. Differential cross sections are measured as functions of a number of kinematic observables. All these results agree with standard model predictions. Searches for anomalous triple gauge couplings are performed, and the four-lepton invariant mass distributions are used to set the most stringent limits to date on a number of parameters affecting neutral gauge boson interactions.