Lattice2010

Session

Parallel 15: Nonzero temperature and density

15 Jun 2010, 08:30

Villasimius, Sardinia

151. Charmonium spectral functions in quark-gluon plasma from lattice QCD　with large spatial volume

Chiho Nonaka (Nagoya University)

15/06/2010, 08:30

Nonzero temperature and density

From phenomenological considerations, J/psi suppression was proposed as a signature of QGP production in relativistic heavy ion collisions, and has been considered as one of the most promising ones. On the other hand, previous studies from lattice QCD and effective theories show possibility of existence of q-\bar{q} correlations even above the critical temperature. We study the...

289. An application of the variational analysis to calculate the meson spectral functions

Hiroshi Ohno (University of Tsukuba)

15/06/2010, 09:10

Nonzero temperature and density

We calculate the meson spectral functions (SPFs) via the variational analysis to investigate the behavior of discrete spectra on a finite volume lattice at finite temperature. Although the vairational method can not extract the whole information of the SPFs, it can calculate the value of SPFs at several low-lying spectra. Therefore, the method will be useful to test if the low-lying states...

249. Charmonium correlation and spectral functions at finite temperature

Heng-Tong DING (Bielefeld University)

15/06/2010, 09:30

Nonzero temperature and density

We investigate the charmonium correlators and spectral functions in quenched QCD, using Clover improved Wilson fermions on very fine (0.01 fm) isotropic lattices at 0.75 $T_c$ ($ 128^3\times96 $) and 1.5 $T_c$ ($128^3 \times48 $). We focus on the thermal modification of the correlation and spectral functions. The charmonium dissociation temperature as well as the heavy quark diffusion...

251. Estimating dilepton rates and electric conductivity from vector current correlation functions in quenched QCD

Frithjof Karsch (Brookhaven National Laboratory and Bielefeld University)

15/06/2010, 09:50

Nonzero temperature and density

We report on a continuum extrapolation of the vector current correlation function for light valence quarks in the deconfined phase of quenched QCD. The vector meson correlator is calculated at T=1.5 Tc at four values of the cut-off on lattices up to size 128^3x48. We determine the first three, non-vanishing thermal moments of the vector meson spectral function. We find that ratios of...