Upsilon Suppression in PbPb Collisions at sqrt(s_NN) = 2.76 TeV
Felix Nendzig, Georg Wolschin
TL;DR
This paper explains the observed suppression of Y(nS) states in PbPb collisions at 2.76 TeV as a result of multiple effects indicating quark-gluon plasma formation.
Contribution
It introduces a combined model of screening, dissociation, damping, and feed-down reduction to explain Y(nS) suppression in heavy-ion collisions.
Findings
Y(nS) suppression consistent with quark-gluon plasma effects
Multiple mechanisms collectively explain suppression patterns
Supports QGP formation evidence in PbPb collisions
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.
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Taxonomy
TopicsHigh-Energy Particle Collisions Research · Particle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions