Measurement of ZZ production in leptonic final states at {\surd}s of   1.96 TeV at CDF
  In this paper we present a precise measurement of the total ZZ production cross section in pp collisions at {\surd}s= 1.96 TeV, using data collected with the CDF II detector corresponding to an integrated luminosity of approximately 6 fb-1. The result is obtained by combining separate measurements in the four-charged (lll'l'), and two-charged-lepton and two-neutral-lepton (llvv) decay modes of the Z. The combined measured cross section for pp {\to} ZZ is 1.64^(+0.44)_(-0.38) pb. This is the most precise measurement of the ZZ production cross section in 1.96 TeV pp collisions to date. 
T. Aaltonen, B. Alvarez Gonzalez, S. Amerio, D. Amidei, A. Anastassov,   A. Annovi, J. Antos, G. Apollinari, J.A. Appel, A. ...
hep-ex