Speaker
Dr
Peter Kovacs
(Wigner RCP)
Description
Chiral phase transition is investigated in an $SU(3)_L \times SU(3)_R$
symmetric vector meson extended linear sigma model with additional
constituent quarks and Polyakov loops (extended Polyakov quark meson
model). The parameterization of the Lagrangian is done at zero
temperature in a hybrid approach, where the mesons are treated at
tree-level, while the constituent quarks at 1-loop level. The
temperature and baryochemical potential dependence of the two assumed
scalar condensates and the two Polyakov loop variables are calculated from the hybrid 1-loop level
field equations. The order of the phase transition along the $T=0$
and $\mu_B=0$ axes are determined for various parameterization
scenarios. We find that in order to have a first order phase
transition at $T=0$ as a function of $\mu_B$ a light isoscalar particle is
needed. We also calculate the temperature and baryochemcal potential depnedence of the usual thermodynamical quantities such as the pressure and energy density, where we take into account the effects of thermal pion loops as well.
Primary author
Dr
Peter Kovacs
(Wigner RCP)
Co-authors
Dr
György Wolf
(RMKI KFKI)
Dr
Zsolt Szep
(Statistical and Biological Physics Research Group of the Hungarian Academy of Sciences)
