Density-dependent effective baryon–baryon interaction from chiral three-baryon forces

摘要: Abstract A density-dependent effective potential for the baryon–baryon interaction in presence of (hyper)nuclear medium is constructed, based on leading (irreducible) three-baryon forces derived within SU(3) chiral field theory. We evaluate contributions from three classes: contact terms, one-pion exchange and two-pion exchange. In strangeness-zero sector we recover known result in-medium nucleon–nucleon interaction. Explicit expressions Λ N (asymmetric) nuclear matter are presented. Our results suitable implementation into calculations matter. order to estimate low-energy constants introduce decuplet baryons as explicit degrees freedom construct relevant terms minimal non-relativistic Lagrangian. With these, estimated through saturation. Utilizing this approximation provide numerical effect three-body force symmetric pure neutron moderate repulsion that increases with density found comparison free