Measurement of the ZZ production cross section in proton-proton collisions at √{s}=8 TeV using the ZZ → ℓ-ℓ+ℓ'-ℓ'+ and ZZto {ℓ}-{ℓ}+ν overline{ν} decay channels with the ATLAS detector

ATLAS COLL., M.AABOUD ET AL.; M. T. DOVA

JOURNAL OF HIGH ENERGY PHYSICS

SPRINGER

Año: 2017

1126-6708

A measurement of the ZZ production cross section in the ℓ-ℓ+ℓ' -ℓ' + and {ℓ}-{ℓ}+ν overline{ν} channels (ℓ = e, μ) in proton-proton collisions at √{s}=8 TeV at the Large Hadron Collider at CERN, using data corresponding to an integrated luminosity of 20.3 fb-1 collected by the ATLAS experiment in 2012 is presented. The fiducial cross sections for ZZ → ℓ-ℓ+ℓ' -ℓ' + and ZZto {ℓ}-{ℓ}+ν overline{ν} are measured in selected phase-space regions. The total cross section for ZZ events produced with both Z bosons in the mass range 66 to 116 GeV is measured from the combination of the two channels to be 7.3 ± 0.4(stat) ± 0.3(syst) - 0.1 - 0.2 (lumi) pb, which is consistent with the Standard Model prediction of 6. 6 - 0.6 + 0.7 pb. The differential cross sections in bins of various kinematic variables are presented. The differential event yield as a function of the transverse momentum of the leading Z boson is used to set limits on anomalous neutral triple gauge boson couplings in ZZ production.