Speaker
Peter Kovacs
(Wigner RCP)
Description
Chiral phase transition is investigated in a SU(3)_L x 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 are calculated from the hybrid 1-loop level
equations of states. 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 investigate the T/mu_B dependence of the scalar meson
curvature masses, where the exact fermion contribution to the masses
are taken into account.
Author
Peter Kovacs
(Wigner RCP)
