Physics Letters B

Volume 722, Issues 1–3, 13 May 2013, Pages 55-62
open access
Physics Letters B

J/ψ production at high transverse momenta in p+p and Au + Au collisions at sNN=200GeV


We report J/ψ spectra for transverse momenta pT>5GeV/c at mid-rapidity in p+p and Au + Au collisions at sNN=200GeV. The inclusive J/ψ spectrum and the extracted B-hadron feed-down are compared to models incorporating different production mechanisms. We observe significant suppression of the J/ψ yields for pT>5GeV/c in 0–30% central Au + Au collisions relative to the p+p yield scaled by the number of binary nucleon–nucleon collisions in Au + Au collisions. In 30–60% mid-central collisions, no such suppression is observed. The level of suppression is consistently less than that of high-pT π± and low-pT J/ψ at RHIC and high-pT J/ψ at the LHC.


J/ψ suppression
Heavy-ion collisions