Upsilon Suppression in PbPb Collisions at sqrt(s_NN) = 2.76 TeV
arXiv:1207.6227
Abstract
We suggest that the combined effect of screening, gluon-induced dissociation, collisional damping, and reduced feed-down explains most of the sequential suppression of Y(nS) states that has been observed in PbPb relative to pp collisions at sqrt(s_NN) = 2.76 TeV. The suppression is thus a clear, albeit indirect, indication for the presence of a qgp.
4 pages, 3 figures, Proc. Hard Probes 2012 conference