Nuclear modification factor of D0 mesons in PbPb collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msqrt><mml:mrow><mml:msub><mml:mrow><mml:mi>s</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">NN</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:msqrt><mml:mo>=</mml:mo><mml:mn>5.02</mml:mn><mml:mspace width="0.2em"/><mml:mtext>TeV</mml:mtext></mml:math>

The transverse momentum (p T ) spectrum of prompt D 0 mesons and their antiparticles has been measured via the hadronic decay channels D 0 K - + and D 0 K + -in pp and PbPb collisions at a centre-of-mass energy of 5.02 TeV per nucleon pair with the CMS detector at the LHC. The measurement is performed in the D 0 meson p T range of 2-100 GeV/c and in the rapidity range of |y| < 1. The pp (PbPb) dataset used for this analysis corresponds to an integrated luminosity of 27.4 pb -1 (530 b -1 ).