Upsilon suppression in PbPb collisions at energies available at the CERN Large Hadron Collider

作者：Nendzig Felix^*; Wolschin Georg

来源：Physical Review C, 2013, 87(2): 024911.

DOI：10.1103/PhysRevC.87.024911

We suggest that the combined effect of screening, gluon-induced dissociation, collisional damping, and reduced feed-down explains most of the sequential suppression of Upsilon(nS) states that has been observed in PbPb relative to pp collisions at root S-NN = 2.76 TeV. The suppression is thus a clear, albeit indirect, indication of the presence of a quark-gluon plasma. The Upsilon(1S) ground state suppression is essentially due to reduced feed-down, collisional damping, and gluon-induced dissociation, whereas screening prevails for the suppression of the excited states. DOI: 10.1103/PhysRevC.87.024911

• 出版日期2013-2-25