Speaker
Dr
Kenji Morita
(Kyot University)
Description
Charmonia in medium provide us information on the change of the confinement
property induced by the medium. We have developed an approach based on
QCD sum rule which connects temperature dependent QCD condensates to
the spectral function through the operator product expansion of the
current correlation function.
The leading contribution to the OPE is the dimension four gluon
condensate which suddenly drops in the vicinity of the deconfinement
transition temperature therefore can be regarded as an effective order
parameter. We showed that this behavior is related to the corresponding
change of the spectral property of the charmonia and is consistent with
lattice QCD measurement of the imaginary time correlators.
In this work, we further extend our prescription to utilize more realistic
gluon condensates measured by lattice QCD with physical quark masses.
By making use of the resonance gas model, we determine the gluon condensates
at nonzero baryonic chemical potential and explore the charmonia at temperature
and chemical potential which are accesible with current and future
experiments. We show that the reduction of the charmonium mass will lead
to change of particle ratio in the statistical hadronization scenario.
Primary author
Dr
Kenji Morita
(Kyot University)
Co-author
Prof.
Su Houng Lee
(Yonsei University)
