Observation of ZZ production in ppbar collisions at sqrt(s) = 1.96 TeV

Abstract

We present an observation for ZZ -> l+l-l'+l'- (l, l' = e or mu) production in ppbar collisions at a center-of-mass energy of sqrt(s) = 1.96 TeV. Using 1.7 fb-1 of data collected by the D0 experiment at the Fermilab Tevatron Collider, we observe three candidate events with an expected background of 0.14 +0.03 -0.02 events. The significance of this observation is 5.3 standard deviations. The combination of D0 results in this channel, as well as in ZZ -> l+l-nunubar, yields a significance of 5.7 standard deviations and a combined cross section of sigma(ZZ) = 1.60 +/- 0.63 (stat.) +0.16 -0.17 (syst.) pb.

7 pages, 1 figure, 2 tables Modified slightly following review process

References in corpus (2)

• Search for ZZ and Zγ^* production in p-barp collisions at sqrt(s) = 1.96 TeV and limits on anomalous ZZZ and ZZγ^* couplings
• ZZ to llvv production in pp collisions at sqrt(s) = 1.96 TeV

Cited by in corpus (6)

• A positive-weight next-to-leading order simulation of weak boson pair production
• Evidence of WW+WZ production with lepton + jets final states in proton-antiproton collisions at sqrt(s)=1.96 TeV
• A Measurement of the t-tbar Cross Section in p-pbar Collisions at sqrt(s) = 1.96 TeV using Dilepton Events with a Lepton plus Track Selection
• Top quark and Electroweak measurements at the Tevatron
• Review of Physics Results from the Tevatron: Electroweak Physics
• Summary of the Electroweak and Beyond the Standard Model Working Group