Speaker
Mr
Mateusz Cierniak
(Institute of Theoretical Physics, University of Wrocław)
Description
The current state-of-the-art quark matter model in astrophysics is the thermodynamic
bag model (tdBAG). This model approximates the effect of quark confinement, but it lacks other
important properties of Quantum Chromodynamics. The vector enhanced bag model (vBAG)
improves the tdBAG approach by taking into account dynamical chiral symmetry breaking and
repulsive vector interactions. The latter is of particular importance to studies of dense matter in
beta-equilibrium in order to explain the 2 solar mass maximum mass constraint for neutron stars.
Another important feature of this model is the assumption of simultaneous chiral symmetry
breaking and confinement. The model can be derived from the QCD based framework of
Dyson-Schwinger equations by assuming a simple quark-quark contact interaction. This work will
focus on the resulting phase diagram and neutron star equations of state.