Bonn 2020 – wissenschaftliches Programm
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T 97.5: Vortrag
Freitag, 3. April 2020, 12:00–12:15, H-HS XI
Measurement of the angular coefficients in Z-boson production at √s=13 TeV with the ATLAS experiment — •Matthias Kohl and Stefan Tapprogge — Institut für Physik, Johannes-Gutenberg-Universität, Mainz
Angular distributions of the Drell-Yan process can probe the underlying QCD dynamics of Z-boson production and can improve predictions for future analyses at hadron colliders. The related angular coefficients can be measured using final states of charged lepton pairs in the Collins-Soper frame, differentially in the transverse momentum, mass and rapidity of the dilepton system.
A previous measurement by ATLAS of the full set of eight angular coefficients A0−A7 was performed at √s=8 TeV. In this talk the current status of the analysis of di-electron and di-muon events at a center-of-mass energy of √s=13 TeV is presented. The data used for the analysis corresponds to 147 fb−1 of pp-collisions at the LHC recorded by the ATLAS experiment. The analysis strategy as well as challenges, the understanding of the data and expected uncertainties are discussed.