出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Recent studies of the spectral functions of charmonia in lattice QCD suggest survival of the J=y
state in the deconfinement phase till relatively high temperature. Based on the studies, different
scenarios of the J=y suppression are discussed to understand experimental results in Heavy Ion
Collision experiments. The scenarios require the information on the dissociation temperatures of
cc and y0 as well as that of J=y. In order to investigate these states in finite temperature lattice
QCD, we have to consider an effect of the characteristic constant mode in meson correlators.
As a result of the study of the constant mode, we find that most drastic changes in charmonium
correlators for the cc states just above the deconfinement transition are caused by the constant
mode. It may indicate the survival of the cc states after the deconfinement transition until, at
least, 1:4Tc.
