Mainz 2022 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

HK: Fachverband Physik der Hadronen und Kerne

HK 62: Structure and Dynamics of Nuclei XI

HK 62.3: Vortrag

Donnerstag, 31. März 2022, 14:45–15:00, HK-H7

Density-dependent in-medium NN-potential from chiral four-nucleon force — •Maurus Geiger and Norbert Kaiser — Physik-Department T39, Technische Universität München, D-85747 Garching, Germany

Density-dependent in-medium NN-potentials are calculated analytically from the five classes of reducible four-nucleon forces (4NF) as derived in chiral effective field theory by Epelbaum (Eur. Phys. J. A34: 197-214 (2007) ). An overview is given over the pertinent two-loop diagrams that are obtained by closing two nucleon lines. A fortunate feature of the chiral 4N forces is that due to their spin- and isospin dependence the selfclosing of a nucleon line gives a vanishing spin or isospin trace in nuclear matter. The current status of the evaluation of the remaining 42 diagrams for each class is presented together with results for the double Fermi-sphere integrals. Since the leading order chiral 4NF does not introduce any unkown parameters, this in-medium NN-potential can provide an interesting testing ground for the ability of chiral EFT to describe nuclear many-body systems.

This work has been supported in part by DFG (Project-ID 196253076 - TRR 110) and NSFC.