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A measurement of inclusive ZZ production cross section and constraints onanomalous triple gauge couplings in proton-proton collisions at sqrt(s) = 8 TeVare presented. A data sample, corresponding to an integrated luminosity of 19.6inverse femtobarns was collected with the CMS experiment at the LHC. Themeasurements are performed in the leptonic decay modes ZZ to lll'l', where l =e, mu and l' = e, mu, tau. The measured total cross section, sigma(pp to ZZ) =7.7 +/- 0.5 (stat.) +0.5-0.4 (syst.) +/- 0.4 (theo.) +/- 0.2 (lum.) pb for bothZ bosons produced in the mass range 60 < m[Z] < 120 GeV, is consistent withstandard model predictions. Differential cross sections are measured and welldescribed by the theoretical predictions. The invariant mass distribution ofthe four-lepton system is used to set limits on anomalous ZZZ and ZZ gammacouplings at the 95% confidence level: -0.004 < f[4,Z] < 0.004, -0.004 < f[5,Z]< 0.004, -0.005 < f[4,gamma] < 0.005, and -0.005 < f[5,gamma] < 0.005.

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Measurement of the pp to ZZ production cross section and constraints on  anomalous triple gauge couplings in four-lepton final states at sqrt(s) = 8  TeV