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Report number arXiv:1706.09363 ; CERN-EP-2017-054
Title Measurement of jet pT correlations in Pb+Pb and pp collisions at sNN=2.76 Te\kern -0.1em V with the ATLAS detector
Author(s) ATLAS Collaboration  Mostrar todos os 2831 autores
Publication 2017-11-10
Imprint 28 Jun 2017
Number of pages 24
Note 40 pages in total, author list starting page 24, 11 figures, 0 tables, published in Phys. Lett. B. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2012-11/
In: Phys. Lett. B 774 (2017) 379-402
DOI 10.1016/j.physletb.2017.09.078
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords relativistic heavy ion physics ; particle correlations and fluctuations ; experimental results
Abstract Measurements of dijet pT correlations in Pb+Pb and pp collisions at a nucleon--nucleon centre-of-mass energy of sNN=2.76 Te\kern -0.1em V 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 nb1 and 4.0 pb1, respectively. Jets are reconstructed using the anti-kt 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 pT1 and pT2. An unfolding procedure is applied to the two-dimensional (pT1, pT2) distributions to account for experimental effects in the measurement of both jets. Distributions of (1/N)dN/dxJ, where xJ=pT2/pT1, are presented as a function of pT1 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.
Related document supersedes: ATLAS-CONF-2015-052
Copyright/License Preprint: © 2017-2025 CERN (License: CC-BY-4.0)



Corresponding record in: Inspire
Email contact: fmalek@lpsc.in2p3.fr


 Record created 2017-06-28, last modified 2024-06-29


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