$D^0$ meson production in pPb and PbPb collisions at $\sqrt {s_{NN}}$ = 5 TeV with LHCb

The LHCb experiment has the unique property to study open heavy flavors in heavy ion interactions in the forward and backward hemisphere, thanks to its forward acceptance 2<η<5 , and the possibility to study proton-lead collisions for both orientations of the beams. In 2015, LHCb also participated successfully for the first time in the lead-lead data-taking. First studies showed that up to semi-central PbPb collisions can be analysed. Furthermore, using the possibility to inject gas into the interaction region, it is in the unique position to do fixed target physics. Results including measurement of the forward-backward production of prompt D 0 in pPb collisions at sNN=5 TeV are presented. Prospects for D 0 production measurement in PbPb and fixed-target collisions are also presented.