Nuclear Modification Factor of prompt ${D}^{\rm 0}$ in PbPb Collisions at $\sqrt{s_{_{\text{NN}}}}$ = 2.76 TeV

Measurements of the production cross section of prompt ${D}^{\rm 0}$ and its antiparticle in PbPb collisions at $\sqrt{s_{_{\text{NN}}}}$ = 2.76 TeV are presented. The nuclear modification factor of prompt ${D}^{\rm 0}$ is measured as functions of both transverse momentum and collision centrality. The nuclear modification factor shows that prompt ${D}^{\rm 0}$ production is suppressed in semi-central to central PbPb collisions at $\sqrt{s_{_{\text{NN}}}}$ = 2.76 TeV.