{\Upsilon} Production in Heavy Ion Collisions at LHC

TL;DR

This paper models {psilon} production in heavy ion collisions at LHC, considering initial production, regeneration, and nuclear matter effects, highlighting the sensitivity of excited states to the medium's temperature.

Contribution

It introduces a dynamical transport approach that incorporates both cold and hot nuclear matter effects for {psilon} production analysis.

Findings

{psilon}(2s) is more sensitive to the medium's temperature than {psilon}(1s).

The model accounts for both initial production and in-medium regeneration.

Both cold and hot nuclear matter effects are significant in {psilon} production.

Abstract

We investigate the {\Upsilon} production in heavy ion collisions at LHC energy in the frame of a dynamical transport approach. Both the initial production and in-medium regeneration and both the cold and hot nuclear matter effects are included in the calculations. In comparison with the ground state {\Upsilon}(1s), the excited state {\Upsilon}(2s) is much more sensitive to the heavy quark potential at finite temperature.