Köln 2025 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 32: Nuclear Astrophysics IV
HK 32.1: Gruppenbericht
Mittwoch, 12. März 2025, 15:45–16:15, SR 0.03 Erw. Physik
Equation of state and Fermi liquid properties of dense matter based on chiral EFT interactions — •Faruk Alp1,2,3, Yannick Dietz1,2, Kai Hebeler1,2,3, and Achim Schwenk1,2,3 — 1Department of Physics, Technische Universität Darmstadt — 2ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schw- erionenforschung GmbH — 3Max-Planck-Institut für Kernphysik, Heidelberg
We give an update on calculations of symmetric nuclear matter and pure neutron matter obtained in many-body-perturbation theory up to third order based on various, recently developed nucleon-nucleon and three-nucleon interactions derived from chiral effective field theory. We extract empirical equation of state parameters and present estimates of the theoretical uncertainties due to neglected higher-order contributions in the many-body expansion as well as the chiral expansion of the interactions. Furthermore, we discuss a Fermi liquid calculations for pure neutron matter and present results for the Landau parameters, quasiparticle effective mass, and the speed of sound.
* Funded by the ERC Grant Agreement No. 101020842 and by the DFG -- Project-ID 279384907 -- SFB 1245.
Keywords: Nuclear matter; Equation of state; Chiral effective field theory; Fermi liquid theory