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HK: Fachverband Physik der Hadronen und Kerne
HK 7: Nuclear Astrophysics I
HK 7.6: Vortrag
Montag, 16. März 2026, 17:45–18:00, PHIL A 602
Towards including hyperons in many-body perturbation theory calculations of dense matter — •Samet Dokur1,2, Kai Hebeler1,2,3, and Achim Schwenk1,2,3 — 1Department of Physics, Technische Universität Darmstadt — 2ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany — 3Max-Planck-Institut für Kernphysik, Heidelberg
We investigate the so-called “hyperon puzzle" by systematically analyzing the impact of hyperons on the properties of dense matter. To this end, we employ systematically improvable interactions derived from chiral effective field theory and compute the corresponding equation of state using many-body perturbation theory. Our aim is to incorporate hyperon-nucleon and hyperon-nucleon-nucleon interactions up to next-to-leading order using the decuplet saturation approximation in our current many-body framework, which is already capable of describing dense matter with nucleon-nucleon and three-nucleon interactions up to next-to-next-to-next-to-leading order. We will outline the many-body approach, address the conceptual and technical challenges associated with hyperonic forces and present first results for the equation of state of neutron-rich matter including calculations of chemical potentials in beta equilibrium.
Funded by the LOEWE Top Professorship LOEWE/4a/519/05.00.002(0014)98.
Keywords: Chiral effective field theory; Hyperon-nucleon interactions; Equation of state