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A Study of Charmonium Systems across the Deconfinement Transition

Saumen Datta, Frithjof Karsch, Peter Petreczky, Ines Wetzorke

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.

A Study of Charmonium Systems across the Deconfinement Transition

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.

Paper Structure

This paper contains 2 equations, 2 figures, 2 tables.

Figures (2)

  • Figure 1: Temporal correlators for the different channels (top: pseudoscalar and vector; bottom: scalar and axial vector) at $\beta$ = 6.499, for $\kappa$ = 0.1300.
  • Figure 2: Spectral functions for the pseudoscalar (top) and axial vector (bottom) channels at 0.93 and 1.25 $T_c$. A detailed error analysis will be presented elsewhere.