Dissociation of quarkonium in hot QCD medium: Modification of the inter-quark potential

We have studied dissociation phenomenon of heavy quarkonium states in hot QCD medium by investigating the medium modifications to heavy quark potential. Here medium modification causes the screening of the charge, not the range of the potential as in the usual Yukawa picture. However, both finally result in weakening the potential which subsequently causes the melting of the bound states. We have then used this medium-modified potential to estimate the dissociation pattern of the charmonium and bottomonium states. We have examined how the dissociation pattern of various quarkonia states change as we go from perturbative to non-perturbative domain in the Debye mass. The results are in good agreement with the other current theoretical works both from the spectral function analysis in lattice QCD and potential models.

12.38.Gc
12.39.Hg
12.38.Mh
quarkonium: dissociation
quark: potential
mass: Debye
matter: effect
quantum chromodynamics: nonperturbative
screening
charmonium

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