Volume 476 - 42nd International Conference on High Energy Physics (ICHEP2024) - Strong Interactions and Hadron Physics
Precision measurements of multijet production with the ATLAS experiment
S. Polacek*  on behalf of the ATLAS Collaboration
*: corresponding author
Full text: pdf
Pre-published on: December 17, 2024
Published on: —
Abstract
The production of jets at hadron colliders provides stringent tests of perturbative QCD. The
latest measurements by the ATLAS experiment are presented in this note, using multijet events
√
produced in the proton–proton collision data at 𝑠 = 13 TeV delivered by the LHC. Jet cross-
section ratios between inclusive bins of jet multiplicity are measured differentially in various
observables sensitive to different features of the final state. Significant improvements of the
overall ATLAS jet energy scale uncertainty, resulting from a reduction of several uncertainty
components, are described. The state-of-the-art NLO and NNLO predictions are compared to
the measurements and used to determine the strong coupling constant. A measurement of new
event-shape jet observables defined in terms of reference geometries with cylindrical and circular
symmetries using the energy-mover’s distance as a metric between collider events is highlighted.
DOI: https://doi.org/10.22323/1.476.0514
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