Speaker
Dr
Norikazu Yamada
(KEK)
Description
We perform lattice numerical simulations to study the phase transition
of QCD at finite temperature and the vanishing chemical potential
with intent to clarify the nature of the transition of massless two
flavor QCD.
We investigate QCD with two
light and N_f heavy quarks instead of two-flavor QCD, and focus on
the light quark mass dependence of the critical heavy mass below which
the transition is of first order.
The nature of the transition is identified by the shape of the
constraint effective potential, constructed from the histogram of the
generalized plaquette, at the critical temperature.
The heavy quark effects are incorporated in the form of the hopping parameter
expansion through the re-weighting technique.
Our result indicates that the critical heavy mass remains finite in
the chiral limit of the two flavors of light quarks, suggesting
the phase transition of massless two-flavor QCD is of second order.
Primary author
Dr
Norikazu Yamada
(KEK)
Co-authors
Dr
Ryo Iwami
(Niigata Univ.)
Prof.
Shinji Ejiri
(Niigata Univ.)
