1204.4945 (H. -T. Ding et al.)

Charmonium properties in hot quenched lattice QCD    [PDF]

H. -T. Ding, A. Francis, O. Kaczmarek, F. Karsch, H. Satz, W. Soeldner

We study the properties of charmonium states at finite temperature in quenched QCD on large and fine isotropic lattices. We perform a detailed analysis of charmonium correlation and spectral functions both below and above $T_c$. Our analysis suggests that both S wave states ($J/\psi$ and $\eta_c$) and P wave states ($\chi_{c0}$ and $\chi_{c1}$) disappear already at about $1.5 T_c$. The charm diffusion coefficient is estimated through the Kubo formula and found to be compatible with zero below $T_c$ and approximately $1/\pi T$ at $1.5 T_c\lesssim T\lesssim 3 T_c$.

View original: http://arxiv.org/abs/1204.4945