Azimuthal anisotropy of charged jet production in √sNN = 2.76 TeV Pb–Pb collisions

Adam, J. and Erhardt, Filip and Planinić, Mirko and Poljak, Nikola and Simatović, Goran and Utrobičić, Antonija and Zyzak, M. (ALICE Collaboration) (2016) Azimuthal anisotropy of charged jet production in √sNN = 2.76 TeV Pb–Pb collisions. Physics Letters B, 753. pp. 511-525. ISSN 0370-2693

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Abstract

We present measurements of the azimuthal dependence of charged jet production in central and semicentral √sNN = 2.76 TeV Pb–Pb collisions with respect to the second harmonic event plane, quantified as vch jet 2 . Jet finding is performed employing the anti-kT algorithm with a resolution parameter R = 0.2 using charged tracks from the ALICE tracking system. The contribution of the azimuthal anisotropy of the underlying event is taken into account event-by-event. The remaining (statistical) region-to-region fluctuations are removed on an ensemble basis by unfolding the jet spectra for different event plane orientations independently. Significant non-zero vch jet 2 is observed in semi-central collisions (30–50% centrality) for 20 < pch jet T < 90 GeV/c. The azimuthal dependence of the charged jet production is similar to the dependence observed for jets comprising both charged and neutral fragments, and compatible with measurements of the v2 of single charged particles at high pT. Good agreement between the data and predictions from JEWEL, an event generator simulating parton shower evolution in the presence of a dense QCD medium, is found in semi-central collisions.

Item Type: Article
Date: 10 February 2016
Subjects: NATURAL SCIENCES > Physics
NATURAL SCIENCES > Physics > Nuclear Physics
Additional Information: © 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3. Received 5 October 2015; Received in revised form 30 November 2015; Accepted 16 December 2015; Available online 18 December 2015.
Divisions: Faculty of Science > Department of Physics
Publisher: Elsevier
Depositing User: Nikola Poljak
Date Deposited: 05 Feb 2016 10:22
Last Modified: 05 Feb 2016 10:46
URI: http://digre.pmf.unizg.hr/id/eprint/4502

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