Charmonium at finite temperature
Abstract
We study charmoinum correlators and spectral functions at finite temperature within the quenched approximation using isotropic lattices with lattice spacing a-1=4.86 GeV and 9.72 GeV. Although we observe some medium modifications of the ground state charmonium spectral function above deconfinement, we find that ground state charmonia (J/psi and etac) exist in the deconfined phase at least up to temperatures as high as 1.5Tc. P-wave charmonia (chic) on the other hand are dissociated already at 1.12Tc.
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