Measurement of hadronic event shapes in high-pT multijet final states at √= 13 TeV with the ATLAS detector
Metadatos
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SpringerLink
Materia
Hadron-Hadron scattering (experiments)
Fecha
2021-01-28Referencia bibliográfica
Aad, G. & Aguilar Saavedra, J.A. & ATLAS collaboration. et. al. J. High Energ. Phys. 2021, 188 (2021). [https://doi.org/10.1007/JHEP01(2021)188]
Patrocinador
CERN for the very successful operation of the LHC; Beijing Municipal Science & Technology Commission, China; COST, ERC, ERDF, Horizon 2020 and Marie Skłodowska-Curie Actions, European Union; Investissements d’Avenir Labex, Investissements d’Avenir Idex and ANR, France; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF, Greece; La Caixa Banking Foundation, CERCA Programme Generalitat de Catalunya and PROMETEO and GenT Programmes Generalitat Valenciana, Spain; Göran Gustafssons Stiftelse, Sweden; The Royal Society and Leverhulme Trust, United Kingdom; Crucial computing support from all WLCG partnersResumen
A measurement of event-shape variables in proton-proton collisions at large
momentum transfer is presented using data collected at √s = 13TeV 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 2TeV. 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.