ZZ to llvv production in pp collisions at sqrt(s) = 1.96 TeV

TL;DR

This paper reports a search for Z boson pair production in proton-proton collisions at 1.96 TeV, measuring a cross section and observing a signal with moderate statistical significance.

Contribution

First measurement of ZZ production cross section in pp collisions at 1.96 TeV using the llvv decay channel with the D0 detector.

Findings

Measured cross section: 2.01 ± 0.93 (stat) ± 0.29 (sys) pb.

Observed signal significance: 2.6 standard deviations.

Results are consistent with Standard Model predictions.

Abstract

We describe a search for Z boson pair production in pp collisions at sqrt(s)= 1.96 TeV with the D0 detector at the Fermilab Tevatron Collider using a data sample corresponding to an integrated luminosity of 2.7 fb^-1. Using the final state decay ZZ to llvv (where l = e or mu) we measure a signal with a 2.6 standard deviations significance (2.0 expected) and measure a cross section of sigma(pp to ZZ + X) = 2.01 +- 0.93 (stat.) +- 0.29 (sys.) pb.