Density-dependent NN-interaction from subsubleading chiral 3N-force: Intermediate-range contributions

Understand

From the subsubleading chiral three-nucleon force [intermediate-range contributions, published in Phys.

• Rev.
• C\,87, 054007 (2013)] a density-dependent NN-interaction $V_\text{med}$ is derived in isospin-symmetric nuclear matter.
• Following the division of the pertinent 3N-diagrams into two-pion-one-pion exchange topology and ring topology, one evaluates for these all selfclosings and concatenations of nucleon-lines to an in-medium loop.