Measurement of D0, D+, D*+ and D s + production in Pb-Pb collisions at √{{s}_{NN}}=5.02 TeV

We report measurements of the production of prompt D⁰, D⁺, D^*+ and D _s ⁺ mesons in Pb-Pb collisions at the centre-of-mass energy per nucleon-nucleon pair √{s_{NN}}=5.02 TeV, in the centrality classes 0-10%, 30-50% and 60-80%. The D-meson production yields are measured at mid-rapidity (| y| < 0 .5) as a function of transverse momentum ( p _T). The p _T intervals covered in central collisions are: 1 < p _T < 50 GeV /c for D⁰, 2 < p _T < 50GeV /c for D⁺, 3 < p _T < 50GeV /c for D^*+, and 4 < p _T < 16GeV /c for D _s ⁺ mesons. The nuclear modification factors ( R _AA) for non-strange D mesons (D⁰, D⁺, D^*+) show minimum values of about 0.2 for p _T = 6-10 GeV /c in the most central collisions and are compatible within uncertainties with those measured at {√{s}}_{NN}=2.76 TeV. For D _s ⁺ mesons, the values of R _AA are larger than those of non-strange D mesons, but compatible within uncertainties. In central collisions the average R _AA of non-strange D mesons is compatible with that of charged particles for p _T > 8 GeV /c, while it is larger at lower p _T. The nuclear modification factors for strange and non-strange D mesons are also compared to theoretical models with different implementations of in-medium energy loss.