PoS - Proceedings of Science
Volume 345 - International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions (HardProbes2018) - Heavy Flavours & Quarkonia
Spectroscopy in the quark-gluon plasma with bottomonia
G. Wolschin
Full text: pdf
Pre-published on: January 11, 2019
Published on: April 24, 2019
Abstract
The suppression of Y-mesons in the hot quark-gluon plasma (QGP) versus reduced feed-
down is investigated in heavy-ion collisions at energies reached at the Large Hadron Collider
(LHC). Our model encompasses screening, collisional damping and gluodissociation in the
QGP. It provides p_T- and centrality-dependent results for the six states involved.
Most of the Y(1S)-suppression is found to be due to reduced feed-down, whereas the
Y(2S)-suppression is mainly caused by hot-medium effects in the collectively expanding QGP.
The previously predicted Y(1S)-suppression in PbPb collisions at sqrt(s_NN) = 5.02 TeV agrees
with recent CMS data, whereas the data for Y(2S) are more strongly suppressed compared to
calculated results in peripheral collisions. Predictions for fixed-target experiments with a
2.76 TeV Pb-beam are shown.
DOI: https://doi.org/10.22323/1.345.0140
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