Nuclear modification of ψ^′, χ_c, and J/ψ production in d+Au collisions at √s_NN=200 GeV

We present results for three charmonia states (ψ^′, χ_c, and J/ψ) in d+Au collisions at |y|<0.35 and √s_NN=200 GeV. We find that the modification of the ψ^′ yield relative to that of the J/ψ scales approximately with charged particle multiplicity at midrapidity across p+A, d+Au, and A+A results from the Super Proton Synchrotron and the Relativistic Heavy Ion Collider. In large-impact-parameter collisions we observe a similar suppression for the ψ^′ and J/ψ, while in small-impact-parameter collisions the more weakly bound ψ^′ is more strongly suppressed. Owing to the short time spent traversing the Au nucleus, the larger ψ^′ suppression in central events is not explained by an increase of the nuclear absorption owing to meson formation time effects.