On the thermalization of quarkonia at the LHC

preprint2014arXivOpen access

Abstract

We argue that the relative yields of ΥΥ states observed at the LHC can be understood as bottomonium states coming to early thermal equilibrium and then freezing out. The bottomonium freezeout temperature is approximately 250 MeV. We examine its systematics as a function of centrality. We remark on the interesting differences seen by the CMS and ALICE experiments in the charmonium sector.

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