Top-quark pair production in association with a Z boson in the 4ℓ channel with the ATLAS experiment

2019/01/14 by Heer, Sebastian
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)

paper · doi:10.48550/arxiv.1901.04408

Abstract

The cross section of the ttZ~and ttW~processes are measured in a simultaneous fit using 36.1 fb^-1 of of proton--proton collisions at a centre-of-mass energy of √(s)=13 TeV recorded by the ATLAS experiment at the LHC. In addition, a fit is performed in the 4ℓ channel only, resulting in a cross section of σ_ttZ = 1.07 ± 0.26 pb. This result is consistent with the combined fit and agrees with the prediction by the Standard Model.

Related

• Top-quark pair production in association with a W or Z boson with the ATLAS experiment
• tt + Z / W / tt at ATLAS
• Measurement of the inclusive and differential cross section of a top quark pair in association with a Z boson at 13 TeV with the ATLAS detector
• Measurement of the ttZ Production Cross Section in the Final State with Three Charged Leptons using 36.1 fb^-1 of pp Collisions at 13 TeV at the ATLAS Detector
• Measurement of the Top Pair Production Cross section at ATLAS