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Measurement of hadronic event shapes in high-pT multijet final states at √s = 13 TeV with the ATLAS detector

The ATLAS collaboration

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Abstract

A measurement of event-shape variables in proton-proton collisions at large momentum transfer is presented using data collected at √s = 13 TeV with the ATLAS detector at the Large Hadron Collider. Six event-shape variables calculated using hadronic jets are studied in inclusive multijet events using data corresponding to an integrated luminosity of 139 fb−1. Measurements are performed in bins of jet multiplicity and in different ranges of the scalar sum of the transverse momenta of the two leading jets, reaching scales beyond 2 TeV. These measurements are compared with predictions from Monte Carlo event generators containing leading-order or next-to-leading order matrix elements matched to parton showers simulated to leading-logarithm accuracy. At low jet multiplicities, shape discrepancies between the measurements and the Monte Carlo predictions are observed. At high jet multiplicities, the shapes are better described but discrepancies in the normalisation are observed.

Original languageEnglish
Article number188
Pages (from-to)1-43
Number of pages44
JournalJournal of High Energy Physics
Volume2021
Issue number1
DOIs
Publication statusPublished - Jan 2021
Externally publishedYes

Bibliographical note

Copyright the Author(s). Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

An erratum exists for this article and can be found in Journal of High Energy Physics, 2021(12), 53, doi: 10.1007/JHEP12(2021)053

Keywords

  • Hadron-Hadron scattering (experiments)

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