D meson elliptic flow in non-central Pb-Pb collisions at sqrts(s_NN) = 2.76TeV

B. Abelev , Laurent Aphecetche (1) , Guillaume Batigne (1) , I. Belikov (2) , A.A.E. Bergognon (1) , M. Bregant (1) , C. Cheshkov (3) , B. Cheynis (3) , H. Delagrange (1) , L. Ducroux (3) , B. Erazmus (1) , Magali Estienne (1) , Marie Germain (1) , J.-Y. Grossiord (3) , Maxime Guilbaud (3) , B. Hippolyte (2) , C. Kuhn (2) , A. Lardeux (1) , J. Martin Blanco (1) , Gines Martinez Garcia (1) , A. Mas (1) , L. Massacrier (1) , L. Molnar (2) , Philippe Pillot (1) , C. Roy (2) , Y. Schutz (1) , Diego Stocco (1) , R. Tieulent (3) , A. Uras (3) , R. Vernet (4) , Y. Zoccarato (3) , Y.W. Baek (5) , V. Barret (5) , N. Bastid (5) , P. Crochet (5) , P. Dupieux (5) , R. Ichou (5) , S. Li (5) , X. Lopez (5) , F. Manso (5) , M. Marchisone (5) , S. Porteboeuf-Houssais (5) , P. Rosnet (5) , B. Vulpescu (5) , X. Zhang (5) , N. Arbor (6) , G. Conesa Balbastre (6) , J. Faivre (6) , C. Furget (6) , R. Guernane (6) , S. Kox (6) , J.S. Real (6) , C. Silvestre (6) , Z. Conesa Del Valle (7) , I. Das (7) , B. Espagnon (7) , C. Hadjidakis (7) , I. Lakomov (7) , C. Suire (7) , J. D. Tapia Takaki (7) , L. Valencia Palomo (7)

1 SUBATECH - Laboratoire SUBATECH Nantes
2 DRS-IPHC - Département Recherches Subatomiques
3 IPNL - Institut de Physique Nucléaire de Lyon
4 CC-IN2P3 - Centre de Calcul de l'IN2P3
5 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
6 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
7 IPNO - Institut de Physique Nucléaire d'Orsay

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 centre-of-mass energy sqrts(s_NN) = 2.76TeV 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 2-16GeV/c$. The measured v2 of D mesons is comparable in magnitude to that of light-flavour hadrons. It is positive in the range 2 < pt < 6 GeV/c with 5.7 sigma significance, based on the combination of statistical and systematic uncertainties.

Domaines: Physique des Hautes Energies - Expérience [hep-ex]; Physique Nucléaire Expérimentale [nucl-ex]

B. Abelev, Laurent Aphecetche, Guillaume Batigne, I. Belikov, A.A.E. Bergognon, et al.. D meson elliptic flow in non-central Pb-Pb collisions at sqrts(s_NN) = 2.76TeV. Physical Review Letters, 2013, 111, pp.102301. ⟨10.1103/PhysRevLett.111.102301⟩. ⟨in2p3-00822069⟩