A1 Journal article (refereed)
Modification of charged-particle jets in event-shape engineered Pb–Pb collisions at √sNN = 5.02 TeV (2024)
ALICE Collaboration. (2024). Modification of charged-particle jets in event-shape engineered Pb–Pb collisions at √sNN = 5.02 TeV. Physics Letters B, 851, Article 138584. https://doi.org/10.1016/j.physletb.2024.138584
JYU authors or editors
Publication details
All authors or editors: ALICE Collaboration
Journal or series: Physics Letters B
ISSN: 0370-2693
eISSN: 1873-2445
Publication year: 2024
Publication date: 18/03/2024
Volume: 851
Article number: 138584
Publisher: Elsevier
Publication country: Netherlands
Publication language: English
DOI: https://doi.org/10.1016/j.physletb.2024.138584
Publication open access: Openly available
Publication channel open access: Open Access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/94916
Publication is parallel published: https://arxiv.org/abs/2307.14097
Abstract
Charged-particle jet yields have been measured in semicentral Pb−Pb collisions at center-of-mass energy per nucleon-nucleon collision √sNN=5.02 TeV with the ALICE detector at the LHC. These yields are reported as a function of the jet transverse momentum, and further classified by their angle with respect to the event plane and the event shape, characterized by ellipticity, in an effort to study the path-length dependence of jet quenching. Jets were reconstructed at midrapidity from charged-particle tracks using the anti-kT algorithm with resolution parameters R= 0.2 and 0.4, with event-plane angle and event-shape values determined using information from forward scintillating detectors. The results presented in this letter show that, in semicentral Pb−Pb collisions, there is no significant difference between jet yields in predominantly isotropic and elliptical events. However, out-of-plane jets are observed to be more suppressed than in-plane jets. Further, this relative suppression is greater for low transverse momentum (< 50 GeV/c) R= 0.2 jets produced in elliptical events, with out-of-plane to in-plane jet-yield ratios varying up to 5.2σ between different event-shape classes. These results agree with previous studies indicating that jets experience azimuthally anisotropic suppression when traversing the QGP medium, and can provide additional constraints on the path-length dependence of jet energy loss.
Keywords: particle physics; nuclear physics; quark-gluon plasma
Contributing organizations
Related projects
- The strong interaction at the frontier of knowledge: fundamental research and applications- STRONG -2020
- Lappi, Tuomas
- European Commission
- Center of Excellence in Quark Matter
- Räsänen, Sami
- Research Council of Finland
- Center of Excellence in Quark Matter
- Kim, Dong
- Research Council of Finland
Ministry reporting: Yes
Reporting Year: 2024
Preliminary JUFO rating: 3