This work investigates a chiral nucleon-meson model which is suited to analyze chiral symmetry breaking and the thermodynamics of nuclear matter at the same time. We go beyond the mean-field approximation by including pionic fluctuations in a non-perturbative way using functional renormalization group methods. Within the model, we can exclude a chiral phase transition for temperatures below 100 MeV and densities up to at least twice the nuclear saturation density. Furthermore, we extend the model to asymmetric nuclear matter and obtain a description for the interior of neutron stars.
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This work investigates a chiral nucleon-meson model which is suited to analyze chiral symmetry breaking and the thermodynamics of nuclear matter at the same time. We go beyond the mean-field approximation by including pionic fluctuations in a non-perturbative way using functional renormalization group methods. Within the model, we can exclude a chiral phase transition for temperatures below 100 MeV and densities up to at least twice the nuclear saturation density. Furthermore, we extend the mode...
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