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arxiv ref:
1405.2219
Title:
ZZ production at hadron colliders in NNLO QCD
Authors:
F. Cascioli, T. Gehrmann, M. Grazzini, S. Kallweit, P. Maierhoefer, A. von Manteuffel, S. Pozzorini, D. Rathlev, L. Tancredi, E. Weihs
