Measurement of jet fragmentation in Pb+Pb and <i>pp</i> collisions at sNN=2.76 TeV with the ATLAS detector at the LHC.



Aaboud, M, Aad, G ORCID: 0000-0002-6665-4934, Abbott, B, Abdallah, J, Abdinov, O, Abeloos, B ORCID: 0000-0001-6432-3042, Abidi, SH ORCID: 0000-0002-8496-9294, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2852 more authors) (2017) Measurement of jet fragmentation in Pb+Pb and <i>pp</i> collisions at sNN=2.76 TeV with the ATLAS detector at the LHC. The European physical journal. C, Particles and fields, 77 (6). 379-.

[img] Text
1702.00674v2.pdf - Published version

Download (788kB)

Abstract

The distributions of transverse momentum and longitudinal momentum fraction of charged particles in jets are measured in Pb+Pb and <i>pp</i> collisions with the ATLAS detector at the LHC. The distributions are measured as a function of jet transverse momentum and rapidity. The analysis utilises an integrated luminosity of 0.14 nb -1 of Pb+Pb data and 4.0 pb -1 of <i>pp</i> data collected in 2011 and 2013, respectively, at the same centre-of-mass energy of 2.76 TeV per colliding nucleon pair. The distributions measured in <i>pp</i> collisions are used as a reference for those measured in Pb+Pb collisions in order to evaluate the impact on the internal structure of jets from the jet energy loss of fast partons propagating through the hot, dense medium created in heavy-ion collisions. Modest but significant centrality-dependent modifications of fragmentation functions in Pb+Pb collisions with respect to those in <i>pp</i> collisions are seen. No significant dependence of modifications on jet pT and rapidity selections is observed except for the fragments with the highest transverse momenta for which some reduction of yields is observed for more forward jets.

Item Type: Article
Additional Information: 41 pages in total, author list starting page 25, 9 figures, 1 table, submitted to EPJC, All figures including auxiliary figures are available at this URL https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2015-05/
Uncontrolled Keywords: ATLAS Collaboration, ATLAS Collaboration, ATLAS Collaboration
Depositing User: Symplectic Admin
Date Deposited: 03 Jul 2017 08:58
Last Modified: 18 Mar 2024 04:10
DOI: 10.1140/epjc/s10052-017-4915-5
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3008198