Charmonium dissociation temperatures in lattice QCD with a finite volume technique

Abstract

Dissociation temperatures of J/ψ, ψ', and χ_c states play key roles in the sequential J/ψsuppression scenario for high energy heavy ion collisions. We report on a study of charmonium dissociation temperatures in quenched lattice QCD. On anisotropic lattices, we first subtract the effects of the constant mode in finite temperature meson correlators, which have lead to unphysical results in previous studies. We then extract ground and first exited state masses by diagonalizing correlation functions among different source and sink operators. To distinguish bound states from scattering states, we first compare the charmonium mass spectra under different spatial boundary conditions, and examine the shape and the volume-dependence of their Bethe-Salpeter wave functions. From these studies, we found so far no sign of scattering states up to about 2.3T_c.

4pages, 2figures, proceedings of Quark Matter 2008 (QM2008), Jaipur, India, Feb 4-10, 2008

References in corpus (8)

• $J/\psi$ and ${\eta }_c$ in the Deconfined Plasma from Lattice QCD
• Behavior of Charmonium Systems after Deconfinement
• Sequential charmonium dissociation
• Charmonium at high temperature in two-flavor QCD
• Charmonium at finite temperature in quenched lattice QCD
• Constant contribution in meson correlators at finite temperature
• Charmonium properties in deconfinement phase in anisotropic lattice QCD
• Numerical study of O(a) improved Wilson quark action on anisotropic lattice

Cited by in corpus (1)

• Colour screening scenario for quarkonia suppression in a quasiparticle model compared with data obtained from experiments at the CERN SPS, BNL RHIC, and CERN LHC