Bonn 2020 – wissenschaftliches Programm
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HK 60.6: Vortrag
Freitag, 3. April 2020, 12:45–13:00, J-HS H
Single-particle potentials of hyperons in nuclear and neutron matter: Role of 3-baryon forces — •Dominik Gerstung, Norbert Kaiser, and Wolfram Weise — Physik Department T39, TU München
The Brueckner G-matrix formalism is employed to calculate the single-particle potentials of nucleons and hyperons in isospin-symmetric nuclear matter and pure neutron matter. The underlying two-body interactions consist of NLO chiral two-baryon potentials and effective density-dependent baryon-baryon interactions derived from the leading order chiral three-baryon forces. We compute the chemical potentials of neutrons and Λ(1116)-hyperons in order to investigate the critical density for the onset of Λ-formation in neutron-star matter.
The contact and one-pion exchange components of the ΛNN 3-body force depend on two yet undetermined short-distance parameters H1 and H2, whose ranges are explored by imposing empirical constraints from Λ-hypernuclei and nuclear matter.
Work supported in part by DFG and NSFC (CRC110).