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The relative modification of the prompt psi(2S) and J/psi yields from pp toPbPb collisions, at the center of mass energy of 5.02 TeV per nucleon pair, ispresented. The analysis is based on pp and PbPb data samples collected by theCMS experiment at the LHC in 2015, corresponding to integrated luminosities of28.0 inverse picobarns and 464 inverse microbarns, respectively. The doubleratio of measured yields of prompt charmonia reconstructed through their decaysinto muon pairs, (N[psi(2S)]/N[J/psi])[PbPb] / (N[psi(2S)]/N[J/psi])[pp], isdetermined as a function of PbPb collision centrality and charmonium transversemomentum pt, in two kinematic intervals: abs(y) < 1.6 covering 6.5 < pt < 30GeV/c and 1.6 < abs(y) < 2.4 covering 3 < pt < 30 GeV/c. Thecentrality-integrated double ratios are 0.36 +/- 0.08 (stat) +/-0.05 (syst) inthe first interval and 0.24 +/- 0.22 (stat) +/- 0.09 (syst) in the second. Thedouble ratio is lower than unity in all the measured bins, suggesting that thepsi(2S) yield is more suppressed than the J/psi yield in the explored phasespace.

Relative modification of prompt psi(2S) and J/psi yields from pp to PbPb collisions at sqrt(s[NN]) = 5.02 TeV