Upsilon suppression in PbPb collisions at the LHC
High Energy Physics - Phenomenology
2013-02-27 v2 Nuclear Theory
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 Upsilon(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. The Upsilon(1S) ground state suppression is essentially due to reduced feed-down, collisional damping and gluodissociation, whereas screening prevails for the suppression of the excited states.
Keywords
Cite
@article{arxiv.1210.8366,
title = {Upsilon suppression in PbPb collisions at the LHC},
author = {Felix Nendzig and Georg Wolschin},
journal= {arXiv preprint arXiv:1210.8366},
year = {2013}
}
Comments
8 pages, 8 figures; Text and Refs. updated; accepted by Phys. Rev. C