Speaker
Description
Relativistic heavy-ion collisions produce extremely hot dense matter.
Heavy flavor and electromagnetic particles are promising probes to
investigate the properties of the hot dense matter. The
parton-hadron-string dynamics (PHSD) is a Boltzmann-type transport code,
but it further includes the off-shellness of particles based on
Kadanoff-Baym equations. The equation-of-state and shear viscosity of a
partonic matter from lattice QCD calculations are implemented in the PHSD.
We use the PHSD to show how heavy flavor mesons and dileptons are produced
and modified through the interactions with hot dense matter in
relativistic heavy-ion collisions from the SPS to the LHC energies. We
have found that not only cold nuclear matter effects such as
(anti)shadowing but also hot nuclear matter effects significantly modify
the production of heavy flavor particles in relativistic heavy-ion
collisions. While intermediate-mass dilepton is mainly contributed from
heavy flavor pair in high-energy heavy-ion collisions, the contribution
from partonic interactions becomes more dominant as collision energy
decreases. It implies that intermediate-mass dilepton in low-energy
heavy-ion collisions has a possibility to carry the information of
partonic matter.
