D Meson Elliptic Flow in Noncentral Pb-Pb Collisions at √sNN=2.76  TeV

Lee Stuart Barnby, David Evans, Orlando Villalobos Baillie, Roman Lietava, Peter Jones, Anton Jusko, Arvinder Palaha, Plamen Petrov, Patrick Scott, Graham Lee, Marian Krivda, Luke Hanratty, Didier Alexandre

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Azimuthally anisotropic distributions of D0, D+, and D*+ mesons were studied in the central rapidity region (|y|<0.8) in Pb-Pb collisions at a center-of-mass energy √sNN=2.76  TeV per nucleon-nucleon collision, with the ALICE detector at the LHC. The second Fourier coefficient v2 (commonly denoted elliptic flow) was measured in the centrality class 30%–50% as a function of the D meson transverse momentum pT, in the range 2–16  GeV/c. The measured v2 of D mesons is comparable in magnitude to that of light-flavor hadrons. It is positive in the range 2<pT<6  GeV/c with 5.7σ significance, based on the combination of statistical and systematic uncertainties.

Original languageEnglish
Article number102301
Number of pages11
JournalPhysical Review Letters
Publication statusPublished - 5 Sept 2013


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