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Advances in High Energy PhysicsVolume 2013 2013, Article ID 242918, 6 pages

Research ArticleFakultät für Physik, Universität Bielefeld, D-33501 Bielefeld, Germany

Received 20 March 2013; Accepted 3 April 2013

Academic Editor: Jan E. Alam

Copyright © 2013 Helmut Satz. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Quarkonium production has been considered as a tool to study the medium formed in high-energy nuclear collisions, assuming that the formation of a hot and dense environment modifies the production pattern observed in elementary collisions. The basic features measured there are the relative fractions of hidden to open heavy flavor and the relative fractions of the different hidden heavy flavor states. Hence the essential question is if and how these quantities are modified in nuclear collisions. We show how the relevant data must be calibrated; that is, what reference has to be used, in order to determine this in a model-independent way.

Autor: Helmut Satz



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