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

2003/08/31 by M. Asakawa, T. Hatsuda · 1 citation
Physics and Astronomy · #hep-lat #hep-ph #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevlett.92.012001

published as Phys.Rev.Lett. 92 (2004) 012001 · 4 pages, 4 figures, REVTEX, version to appear in Physical Review Letters

arxiv created 2003/11/13 · arxiv updated 2009/12/01

Abstract

Analyzing correlation functions of charmonia at finite temperature (T) on 32³×(32-96) anisotropic lattices by the maximum entropy method (MEM), we find that J/ψ and η_c survive as distinct resonances in the plasma even up to T ≃ 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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