@misc{10481/84836,
year = {2023},
month = {6},
url = {https://hdl.handle.net/10481/84836},
abstract = {A measurement of observables sensitive to effects of colour reconnection in top-quark pair-production events is presented using 139 fb - 1 of 13 TeV proton–proton collision data collected by the ATLAS detector at the LHC. Events are selected by requiring exactly one isolated electron and one isolated muon with opposite charge and two or three jets, where exactly two jets are required to be b-tagged. For the selected events, measurements are presented for the charged-particle multiplicity, the scalar sum of the transverse momenta of the charged particles, and the same scalar sum in bins of charged-particle multiplicity. These observables are unfolded to the stable-particle level, thereby correcting for migration effects due to finite detector resolution, acceptance and efficiency effects. The particle-level measurements are compared with different colour reconnection models in Monte Carlo generators. These measurements disfavour some of the colour reconnection models and provide inputs to future optimisation of the parameters in Monte Carlo generators.},
organization = {EU-ESF},
organization = {GenT Programmes Generalitat Valenciana, Spain},
organization = {La Caixa Banking Foundation},
organization = {PROMETEO},
organization = {H2020 Marie Skłodowska-Curie Actions
 	MSCA},
organization = {CERN},
organization = {European Research Council
 	ERC},
organization = {European Cooperation in Science and Technology
 	COST},
organization = {Generalitat de Catalunya},
organization = {Agencia Nacional de Promoción Científica y Tecnológica
 	ANPCyT},
organization = {Ministerio de Ciencia e Innovación
 	MICINN},
organization = {Horizon 2020},
organization = {European Regional Development Fund
 	ERDF},
organization = {Agencia Nacional de Investigación y Desarrollo
 	ANID},
organization = {PIC (Spain)},
publisher = {Springer Nature},
title = {Measurements of observables sensitive to colour reconnection in tt¯ events with the ATLAS detector at √s= 13 TeV},
doi = {10.1140/epjc/s10052-023-11479-x},
author = {Aad, Georges and Aguilar Saavedra, Juan Antonio and Rodríguez Chala, Mikael and Atlas Collaboration},
}