Aaboud, M;
Aad, G;
Abbott, B;
Abdallah, J;
Abdinov, O;
Abeloos, B;
Abidi, SH;
... Zwalinski, L; + view all
(2017)
Measurement of jet pT correlations in Pb+Pb and pp collisions at √sNN = 2.76 TeV with the ATLAS detector.
Physics Letters B
, 774
pp. 379-402.
10.1016/j.physletb.2017.09.078.
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Abstract
Measurements of dijet pT correlations in Pb+Pb and pp collisions at a nucleon–nucleon centre-ofmass energy of √sNN = 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-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 subleading 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.
| Type: | Article |
|---|---|
| Title: | Measurement of jet pT correlations in Pb+Pb and pp collisions at √sNN = 2.76 TeV with the ATLAS detector |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.physletb.2017.09.078 |
| Publisher version: | http://dx.doi.org/10.1016/j.physletb.2017.09.078 |
| Language: | English |
| Additional information: | © 2017 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/) |
| Keywords: | TRANSVERSE-MOMENTUM DEPENDENCE, LEAD-LEAD COLLISIONS, COLLABORATION |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10040964 |
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