Uncovering the mechanism of chiral three-nucleon force in driving spin–orbit splitting

by Dr Tokuro Fukui (Kyushu University)

Tuesday Nov 25, 2025, 2:00 PM → 3:00 PM Europe/Paris

100/2-A201 - Salle A201 (IJCLab)

We clarify the relationship between spin–orbit (SO) splitting and three-nucleon forces (3NFs) derived from chiral effective field theory. While the influence of 3NFs on enhancing SO splitting is well known, the mechanisms underlying this enhancement have remained elusive. Through the irreducible tensor decomposition of the chiral 3NF, our investigation reveals that the rank-1 tensor component of the 3NF contributes primarily to the SO splitting in light nuclei.

We also discuss the antisymmetric nature of the rank-1 3NF, which is akin to the Dzyaloshinsky–Moriya interaction causing the spin canting in magnetic ions.

Abstract.pdf

Orasay3NFseminar2025.pdf