Speaker
Description
The leading and subleading three-pion exchange potentials have so far only been derived in chiral EFT by Norbert Kaiser using S-matrix matching. However, nuclear potentials are scheme-dependent quantities, and it is not a priori clear if the available results are consistent with the interactions and currents derived by the Bochum group using a different technique, the so-called Method of Unitary Transformation (MUT). Here, we re-calculate the leading and subleading three-pion exchange potentials using the MUT. We indeed find deviations from the previously obtained results for selected classes of reducible-like diagrams. We present analytical expressions for the three-pion exchange potential consistent with the interactions used by the Bochum group and discuss the numerical importance of the observed differences.
