| Abstract: | We present results for three charmonia states (psi^prime, chi_c and J/psi) in
d+Au collisions at |y|<0.35 and sqrt(s_NN)=200 GeV. We find that the
modification of the psi^prime yield relative to that of the J/psi 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 psi^prime and J/psi, while in small impact-parameter
collisions the more weakly bound psi^prime is more strongly suppressed. Owing
to the short time spent traversing the Au nucleus, the larger psi^prime
suppression in central events is not explained by an increase of the nuclear
absorption due to meson formation time effects. |
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