Journal of High Energy Physics > 2016 > 2016 > 3 > 1-43
Transverse momentum dependence of D-meson production in Pb-Pb collisions at s N N = 2.76 $$ \sqrt{{\mathrm{s}}_{\mathrm{NN}}}=2.76 $$ TeV
Source
Abstract
The production of prompt charmed mesons D0, D+ and D∗+, and their antiparticles, was measured with the ALICE detector in Pb-Pb collisions at the centre-of-mass energy per nucleon pair, s N N $$ \sqrt{s_{\mathrm{NN}}} $$ , of 2.76 TeV. The production yields for rapidity |y| < 0.5 are presented as a function of transverse momentum, p T, in the interval 1–36 GeV/c for the centrality class 0–10% and in the interval 1–16 GeV/c for the centrality class 30–50%. The nuclear modification factor R AA was computed using a proton-proton reference at s = 2.76 $$ \sqrt{s}=2.76 $$ TeV, based on measurements at s = 7 $$ \sqrt{s}=7 $$ TeV and on theoretical calculations. A maximum suppression by a factor of 5-6 with respect to binary-scaled pp yields is observed for the most central collisions at p T of about 10 GeV/c. A suppression by a factor of about 2-3 persists at the highest p T covered by the measurements. At low p T (1-3 GeV/c), the R AA has large uncertainties that span the range 0.35 (factor of about 3 suppression) to 1 (no suppression). In all p T intervals, the R AA is larger in the 30-50% centrality class compared to central collisions. The D-meson R AA is also compared with that of charged pions and, at large p T, charged hadrons, and with model calculations.
Identifiers
journal e-ISSN : | 1029-8479 |
DOI | 10.1007/JHEP03(2016)081 |
Authors
J. Adam
- Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Prague, Czech Republic
D. Adamová
- Academy of Sciences of the Czech Republic, Nuclear Physics Institute, Řež u Prahy, Czech Republic