SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 20: Structure and Dynamics of Nuclei III
HK 20.5: Vortrag
Dienstag, 21. März 2023, 18:30–18:45, SCH/A118
Improving Skryme energy density functionals with chiral effective field theory — •Lars Zurek1,2, Scott K. Bogner3, Richard J. Furnstahl4, Rodrigo Navarro Pérez5, Nicolas Schunck6, and Achim Schwenk1,2,7 — 1Technische Universität Darmstadt, Department of Physics — 2ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH — 3Facility for Rare Isotope Beams and Department of Physics and Astronomy, Michigan State University — 4Department of Physics, The Ohio State University — 5Department of Physics, San Diego State University — 6Nuclear and Data Theory group, Nuclear and Chemical Science Division, Lawrence Livermore National Laboratory — 7Max-Planck-Institut für Kernphysik, Heidelberg
Nuclear energy density functionals (EDFs) successfully reproduce experimental binding energies but due to their phenomenological nature it is at present unclear how to improve the currently established forms. We construct hybrid EDFs by starting from a standard Skyrme functional, here considered to represent short-range physics, and adding explicitly pion exchanges derived from chiral effective field theory. Pions are included at the Hartree-Fock level without introducing further fit parameters to the functional. When going beyond next-to-leading order in the chiral expansion the functionals are significantly improved compared to a reference Skyrme EDF constructed with the same protocol. We compare the different functionals and analyze their performance.
* Funded by BMBF Contract No. 05P21RDFNB.