Heavy quarkonium in a holographic QCD model

Details Heavy quarkonium in a holographic QCD model Heavy quarkonium in a holographic QCD model

2007-03-16

arxiv.org/abs/hep-ph/0703172v2

Phys.Rev.D75:114008,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 1 figure, minor revision, to appear in phys. Rev. D

Scientific paper

10.1103/PhysRevD.75.114008

Encouraged by recent developments in AdS/QCD models for light quark system, we study heavy quarkonium in the framework of the AdS/QCD models. We calculate the masses of $c\bar c$ vector meson states using the AdS/QCD models at zero and at finite temperature. Among the models adopted in this work, we find that the soft wall model describes the low-lying heavy quark meson states at zero temperature relatively well. At finite temperature, we observe that once the bound state is above $T_c$, its mass will increase with temperature until it dissociates at a temperature of around $494 {\rm MeV}$. It is shown that the dissociation temperature is fixed by the infrared cutoff of the models. The present model serves as a unified non perturbative model to investigate the properties of bound quarkonium states above $T_c$.

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