$J/ψ$ and $η_c$ in the Deconfined Plasma from Lattice QCD

Details $J/ψ$ and $η_c$ in the Deconfined Plasma from Lattice QCD $J/ψ$ and $η_c$ in the Deconfined Plasma from Lattice QCD

2003-08-28

arxiv.org/abs/hep-lat/0308034v2

Phys.Rev.Lett. 92 (2004) 012001

Physics

High Energy Physics

High Energy Physics - Lattice

4 pages, 4 figures, REVTEX, version to appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.92.012001

Analyzing correlation functions of charmonia at finite temperature ($T$) on $32^3\times(32-96)$ anisotropic lattices by the maximum entropy method (MEM), we find that $J/\psi$ and $\eta_c$ survive as distinct resonances in the plasma even up to $T \simeq 1.6 T_c$ and that they eventually dissociate between $1.6 T_c$ and $1.9 T_c$ ($T_c$ is the critical temperature of deconfinement). This suggests that the deconfined plasma is non-perturbative enough to hold heavy-quark bound states. The importance of having sufficient number of temporal data points in MEM analyses is also emphasized.

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