Measurement of jet p T correlations in Pb + Pb and pp collisions at s NN =2.76 TeVwith the ATLAS detector

Measurements of dijet p T correlations in Pb+Pb and pp collisions at a nucleon–nucleon centre-of-mass energy of s NN =2.76 TeV are presented. The measurements are performed with the ATLAS detector at the Large Hadron Collider using Pb+Pb and pp data samples corresponding to integrated luminosities o...

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Autor principal: Aaboud, M.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03702693_v774_n_p379_Aaboud
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_03702693_v774_n_p379_Aaboud2023-10-03T15:29:55Z Measurement of jet p T correlations in Pb + Pb and pp collisions at s NN =2.76 TeVwith the ATLAS detector Aaboud, M. Measurements of dijet p T correlations in Pb+Pb and pp collisions at a nucleon–nucleon centre-of-mass energy of s NN =2.76 TeV are presented. The measurements are performed with the ATLAS detector at the Large Hadron Collider using Pb+Pb and pp data samples corresponding to integrated luminosities of 0.14 nb −1 and 4.0 pb −1 , respectively. Jets are reconstructed using the anti-k t algorithm with radius parameter values R=0.3 and R=0.4. A background subtraction procedure is applied to correct the jets for the large underlying event present in Pb+Pb collisions. The leading and sub-leading jet transverse momenta are denoted p T 1 and p T 2 . An unfolding procedure is applied to the two-dimensional (p T 1 ,p T 2 ) distributions to account for experimental effects in the measurement of both jets. Distributions of (1/N)dN/dx J , where x J =p T 2 /p T 1 , are presented as a function of p T 1 and collision centrality. The distributions are found to be similar in peripheral Pb+Pb collisions and pp collisions, but highly modified in central Pb+Pb collisions. Similar features are present in both the R=0.3 and R=0.4 results, indicating that the effects of the underlying event are properly accounted for in the measurement. The results are qualitatively consistent with expectations from partonic energy loss models. © 2017 The Author JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03702693_v774_n_p379_Aaboud
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Measurements of dijet p T correlations in Pb+Pb and pp collisions at a nucleon–nucleon centre-of-mass energy of s NN =2.76 TeV are presented. The measurements are performed with the ATLAS detector at the Large Hadron Collider using Pb+Pb and pp data samples corresponding to integrated luminosities of 0.14 nb −1 and 4.0 pb −1 , respectively. Jets are reconstructed using the anti-k t algorithm with radius parameter values R=0.3 and R=0.4. A background subtraction procedure is applied to correct the jets for the large underlying event present in Pb+Pb collisions. The leading and sub-leading jet transverse momenta are denoted p T 1 and p T 2 . An unfolding procedure is applied to the two-dimensional (p T 1 ,p T 2 ) distributions to account for experimental effects in the measurement of both jets. Distributions of (1/N)dN/dx J , where x J =p T 2 /p T 1 , are presented as a function of p T 1 and collision centrality. The distributions are found to be similar in peripheral Pb+Pb collisions and pp collisions, but highly modified in central Pb+Pb collisions. Similar features are present in both the R=0.3 and R=0.4 results, indicating that the effects of the underlying event are properly accounted for in the measurement. The results are qualitatively consistent with expectations from partonic energy loss models. © 2017 The Author
format JOUR
author Aaboud, M.
spellingShingle Aaboud, M.
Measurement of jet p T correlations in Pb + Pb and pp collisions at s NN =2.76 TeVwith the ATLAS detector
author_facet Aaboud, M.
author_sort Aaboud, M.
title Measurement of jet p T correlations in Pb + Pb and pp collisions at s NN =2.76 TeVwith the ATLAS detector
title_short Measurement of jet p T correlations in Pb + Pb and pp collisions at s NN =2.76 TeVwith the ATLAS detector
title_full Measurement of jet p T correlations in Pb + Pb and pp collisions at s NN =2.76 TeVwith the ATLAS detector
title_fullStr Measurement of jet p T correlations in Pb + Pb and pp collisions at s NN =2.76 TeVwith the ATLAS detector
title_full_unstemmed Measurement of jet p T correlations in Pb + Pb and pp collisions at s NN =2.76 TeVwith the ATLAS detector
title_sort measurement of jet p t correlations in pb + pb and pp collisions at s nn =2.76 tevwith the atlas detector
url http://hdl.handle.net/20.500.12110/paper_03702693_v774_n_p379_Aaboud
work_keys_str_mv AT aaboudm measurementofjetptcorrelationsinpbpbandppcollisionsatsnn276tevwiththeatlasdetector
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