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Nuclear Modification of ψ′, χc, and J/ψ Production in d+Au Collisions at sNN−−−−√=200 GeV

Abstract : We present results for three charmonia states (ψ′, χc, and J/ψ) in d+Au collisions at |y|<0.35 and sNN−−−√=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.
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http://hal.in2p3.fr/in2p3-00933258
Contributor : Sophie Heurteau <>
Submitted on : Monday, January 20, 2014 - 11:36:23 AM
Last modification on : Wednesday, September 16, 2020 - 4:07:56 PM

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A. Adare, D. Jouan, G. Roche, E. T. Atomssa, Z. Conesa del Valle, et al.. Nuclear Modification of ψ′, χc, and J/ψ Production in d+Au Collisions at sNN−−−−√=200 GeV. Physical Review Letters, American Physical Society, 2013, 111, pp.212301. ⟨10.1103/PhysRevLett.111.202301⟩. ⟨in2p3-00933258⟩

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