Abstract
Suppression of quarkonia in heavy-ion collisions with respect to proton–proton collisions due to the Debye screening of the potential between the heavy quarks was hypothesized to be a signature of the quark–gluon plasma (QGP) (Matsui and Satz 1986 Phys. Lett. B 178 146). However, other effects besides Debye screening, such as the statistical recombination of heavy-flavor pairs, or co-mover absorption can also affect quarkonia production in heavy-ion collisions. Quantifying the suppression of an entire family of quarkonium mesons can give us a model-dependent constraint on the temperature. The suppression of ϒ can be quantified by calculating the nuclear modification factor, RAA, which is the ratio of the production in Au+Au collisions to the production in p+p scaled by the number of binary collisions. We present our results for mid-rapidity ϒ(1S+2S+3S) production in p+p and Au+Au collisions at √sNN = 200 GeV. The centrality dependence of RAA will be shown for the combined ϒ(1S+2S+3S) yield.
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