Azimuthal anisotropy of charged jet production in Pb-Pb collisions
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We present measurements of the azimuthal dependence of charged jet production in central and semi-central View the MathML sourceainer hidden">sNN=2.76 TeV Pb–Pb collisions with respect to the second harmonic event plane, quantified as View the MathML sourceainer hidden">v2ch jet. Jet finding is performed employing the anti-kTainer hidden">kT algorithm with a resolution parameter R=0.2ainer hidden">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 View the MathML sourceainer hidden">v2ch jet is observed in semi-central collisions (30–50% centrality) for View the MathML sourceainer hidden">20<pTch 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 v2ainer hidden">v2 of single charged particles at high pTainer hidden">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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