Azimuthal anisotropy of D -meson production in Pb-Pb collisions at sNN =2.76 TeV

0440764 - ÚJF 2015 RIV US eng J - Journal Article
Abelev, B. - Adam, J. - Adamová, Dagmar - Bielčík, J. - Bielčíková, Jana - Broz, M. - Čepila, J. - Ferencei, Jozef - Hladký, Jan - Křelina, M. - Křížek, Filip - Kučera, Vít - Kushpil, Svetlana - Mareš, Jiří A. - Pachr, M. - Petráček, V. - Petráň, M. - Schulc, M. - Špaček, M. - Šumbera, Michal - Vajzer, Michal - Wagner, V. - Zach, Č. - Závada, Petr … Total 947 authors
Azimuthal anisotropy of D -meson production in Pb-Pb collisions at sNN =2.76 TeV.
Physical Review. C. Roč. 90, č. 3 (2014), s. 034904. ISSN 0556-2813
R&D Projects: GA MŠMT(CZ) LG13031
Institutional support: RVO:68378271 ; RVO:61389005
Keywords : ALICE collaboration * heavy ion collisions * meson production
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders; BF - Elementary Particles and High Energy Physics (FZU-D)
Impact factor: 3.733, year: 2014

The production of the prompt charmed mesons D0, D+, and D*+ relative to the reaction plane was measured in Pb-Pb collisions at a center-of-mass energy per nucleon-nucleon collision of sNN=2.76TeV with the ALICE detector at the CERN Large Hadron Collider. D mesons were reconstructed via their hadronic decays at central rapidity in the transverse-momentum (pT) interval 2-16 GeV/c. The azimuthal anisotropy is quantified in terms of the second coefficient v2 in a Fourier expansion of the D-meson azimuthal distribution and in terms of the nuclear modification factor RAA, measured in the direction of the reaction plane and orthogonal to it. The v2 coefficient was measured with three different methods and in three centrality classes in the interval 0%-50%. A positive v2 is observed in midcentral collisions (30%-50% centrality class), with a mean value of 0.204-0.036+0.099 (tot. unc.) in the interval 2<pT<6GeV/c, which decreases towards more central collisions (10%-30% and 0%-10% classes). The positive v2 is also reflected in the nuclear modification factor, which shows a stronger suppression in the direction orthogonal to the reaction plane for midcentral collisions.
Permanent Link: http://hdl.handle.net/11104/0243894