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

J., Adam ; Christiansen, P. LU ; Ljunggren, H. ; Oskarsson, A. LU ; Richert, T. LU ; Silvermyr, D. LU orcid ; Søgaard, C. LU ; Stenlund, E. LU ; Vislavicius, V. LU and M., Zyzak (2016) In Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 753. p.511-525
Abstract
We present measurements of the azimuthal dependence of charged jet production in central and semi-central sNN=2.76 TeV Pb–Pb collisions with respect to the second harmonic event plane, quantified as v2 ch jet. 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 v2 ch jet is observed in semi-central collisions (30–50% centrality) for 20<pT ch... (More)
We present measurements of the azimuthal dependence of charged jet production in central and semi-central sNN=2.76 TeV Pb–Pb collisions with respect to the second harmonic event plane, quantified as v2 ch jet. 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 v2 ch jet is observed in semi-central collisions (30–50% centrality) for 20<pT ch jet<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.
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type
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publication status
published
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in
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
volume
753
pages
15 pages
publisher
Elsevier
external identifiers
  • scopus:85040843301
ISSN
0370-2693
DOI
10.1016/j.physletb.2015.12.047
language
English
LU publication?
yes
id
1d6e0f1b-ad26-4ea9-9874-1baf7b8469a9
date added to LUP
2022-04-04 14:17:03
date last changed
2023-03-08 06:32:22
@article{1d6e0f1b-ad26-4ea9-9874-1baf7b8469a9,
  abstract     = {{We present measurements of the azimuthal dependence of charged jet production in central and semi-central sNN=2.76 TeV Pb–Pb collisions with respect to the second harmonic event plane, quantified as v2 ch jet. 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 v2 ch jet is observed in semi-central collisions (30–50% centrality) for 20&lt;pT ch jet&lt;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. <br/>}},
  author       = {{J., Adam and Christiansen, P. and Ljunggren, H. and Oskarsson, A. and Richert, T. and Silvermyr, D. and Søgaard, C. and Stenlund, E. and Vislavicius, V. and M., Zyzak}},
  issn         = {{0370-2693}},
  language     = {{eng}},
  pages        = {{511--525}},
  publisher    = {{Elsevier}},
  series       = {{Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics}},
  title        = {{Azimuthal anisotropy of charged jet production in √sNN=2.76 TeV Pb–Pb collisions}},
  url          = {{http://dx.doi.org/10.1016/j.physletb.2015.12.047}},
  doi          = {{10.1016/j.physletb.2015.12.047}},
  volume       = {{753}},
  year         = {{2016}},
}