Measurement of hadronic event shapes in high-p(T) multijet final states at root s=13 TeV with the ATLAS detector

A measurement of event-shape variables in proton-proton collisions at large momentum transfer is presented using data collected at root 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 u...

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Bibliographic Details
Published in:The journal of high energy physics 2021 (1)
Main Authors: Aaboud, M., Kastanas, Konstatinos A., Jensen, Bengt, Ohm, Christian, Ripellino, Giulia, Sidebo, P. Edvin, Strandberg, Jonas, Zwalinski, L., et al
Format: Article
Language:English
Subjects:
Fysik
Hadron-Hadron scattering (experiments)
Natural Sciences
Naturvetenskap
Physical Sciences
Subatomic Physics
Subatomär fysik
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Summary:A measurement of event-shape variables in proton-proton collisions at large momentum transfer is presented using data collected at root 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.
ISSN:1029-8479
1126-6708
DOI:10.1007/JHEP01(2021)188