A Study of Charmonium Systems across the Deconfinement Transition

TL;DR

This study investigates charmonium systems near the deconfinement transition using lattice QCD, revealing that certain correlators remain stable across the transition, unlike light quark systems.

Contribution

It provides new lattice QCD results on charmonium behavior across the deconfinement transition at various temperatures and lattice spacings.

Findings

Correlators in pseudoscalar and vector channels change little across the transition.

Charmonium spectral functions show stability near the deconfinement temperature.

Results suggest charmonium states may survive above Tc.

Abstract

We present results from lattice studies of charmonium systems near the deconfinement transition temperature. On quenched isotropic lattices with lattice spacings between 0.02 and 0.05 fm, bar{q} q systems with quark masses close to the charm mass and with different spin-parity quantum numbers are studied in the temperature range 0.9 Tc - 3 Tc. Results for temporal correlators of local operators, and the spectral functions constructed from them, are discussed. For the pseudoscalar and vector channels, the correlators are observed to change very little across the deconfinement transition, unlike in the case of the light quarks.