Regular Article - Theoretical Physics
Quarkonium binding and entropic force
Fakultät für Physik, Universität Bielefeld, 33501, Bielefeld, Germany
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Accepted: 20 April 2015
Published online: 6 May 2015
A bound state represents a balance between repulsive kinetic and attractive potential energy. In a hot quark–gluon plasma, the interaction potential experiences medium effects. Color screening modifies the attractive binding force between the quarks, while the increase of entropy with separation gives rise to a growing repulsion. We study the role of these phenomena for in-medium binding and dissociation. It is found that the relevant potential for binding is the free energy ; with increasing separation, further binding through the internal energy is compensated by repulsive entropic effects.
© SIF and Springer-Verlag Berlin Heidelberg, 2015