Mr Matthias Drews (TUM, Munich)
We study a chiral nucleon-meson model, which turns out to be perfectly suited to analyze both the thermodynamics of nuclear matter and chiral symmetry breaking. The model is extended by a self-consistent treatment of fluctuations with methods of the functional renormalization group. The results are in good agreement with thermodynamical calculations in the framework of in-medium chiral effective field theory. In addition, there is no hint of a chiral phase transition for temperatures below 100 MeV and densities below about twice the nuclear saturation density. Next, the model is extended to asymmetric nuclear matter. The neutron matter equation of state is studied. It is found to satisfy the constraints from the observation of two-solar mass neutron stars.
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Mr Matthias Drews (TUM, Munich) Prof. Wolfram Weise (TUM, Munich; ECT*, Trento)