Butterworth, Jonathan;
ATLAS Collaboration;
(2023)
Measurements of the suppression and correlations of dijets
in Pb+Pb collisions at √sNN = 5.02 TeV.
Physical Review C: Nuclear Physics
, 107
, Article 054908. 10.1103/physrevc.107.054908.
Preview |
Text
PhysRevC.107.054908.pdf - Published Version Download (4MB) | Preview |
Abstract
Studies of the correlations of the two highest transverse momentum (leading) jets in individual Pb+Pb collision events can provide information about the mechanism of jet quenching by the hot and dense matter created in such collisions. In Pb+Pb and p p collisions at √ s N N = 5.02 TeV , measurements of the leading dijet transverse momentum ( p T ) correlations are presented. Additionally, measurements in Pb+Pb collisions of the dijet pair nuclear modification factors projected along leading and subleading jet p T are made. The measurements are performed using the ATLAS detector at the LHC with 260 pb − 1 of p p data collected in 2017 and 2.2 nb − 1 of Pb+Pb data collected in 2015 and 2018. An unfolding procedure is applied to the two-dimensional leading and subleading jet p T distributions to account for experimental effects in the measurement of both jets. Results are provided for dijets with leading jet p T greater than 100 GeV . Measurements of the dijet-yield-normalized x J distributions in Pb+Pb collisions show an increased fraction of imbalanced jets compared to p p collisions; these measurements are in agreement with previous measurements of the same quantity at 2.76 TeV in the overlapping kinematic range. Measurements of the absolutely normalized dijet rate in Pb+Pb and p p collisions are also presented, and show that balanced dijets are significantly more suppressed than imbalanced dijets in Pb+Pb collisions. It is observed in the measurements of the pair nuclear modification factors that the subleading jets are significantly suppressed relative to leading jets with p T between 100 and 316 GeV for all centralities in Pb+Pb collisions.
| Type: | Article |
|---|---|
| Title: | Measurements of the suppression and correlations of dijets in Pb+Pb collisions at √sNN = 5.02 TeV |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/physrevc.107.054908 |
| Publisher version: | https://doi.org/10.1103/PhysRevC.107.054908 |
| Language: | English |
| Additional information: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. |
| 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/10171648 |
Archive Staff Only
 |
View Item |
