Speaker
Dr
Hiroshi Ohno
(Center for Computational Sciences, University of Tsukuba)
Description
We investigate charmonium and bottomonium correlation and spectral functions in lattice QCD at finite temperature
to understand in-medium properties of charmonia and bottomonia as well as the heavy quark diffusion.
Our simulations with the quenched approximation are performed on large isotropic lattices with a couple of
lattice spacings towards the continuum limit. At temperatures in a range from 0.73$T_c$ to 2.2$T_c$
with two different quark masses for charm and bottom we reconstruct spectral functions from Euclidean meson
correlation functions. Th heavy quark diffusion coefficient can be estimated from behavior of the correlation function
for the vector channel at large imaginary time separation as well as low-frequency behavior of the corresponding spectral function.
We show temperature and quark mass dependence of the spectral functions and discuss dissociation of charmonia
and bottomonia. We also show temperature dependence of the heavy quark diffusion coefficient for the charm and
bottom quarks.
Primary author
Dr
Hiroshi Ohno
(Center for Computational Sciences, University of Tsukuba)
Co-authors
Heng-Tong Ding
(Central China Normal University)
Olaf Kaczmarek
(University of Bielefeld)
Swagato Mukherjee
(Brookhaven National Laboratory)
