Effects of the three-body force in three-nucleon systems

The effects of the three-body force are investigated in the three-nucleon systems. The three-body Faddeev equation is completely solved with a phenomenological three-body force which can reproduce the triton binding energy. The adopted two-body force is the PEST potential (or the Ernst-Shakin-Thaler’s separable expansion of the Paris potential) up to J=2. Calculated results of the differential cross section, and the values of the doublet and the quartet n-d scattering lengths, agree very well with the experimental data. The calculated three-body-force effects on the N-d scattering observables ${\mathit{A}}_{\mathit{y}}$, ${\mathit{iT}}_{11}$, ${\mathit{T}}_{20}$, ${\mathit{T}}_{21}$, ${\mathit{T}}_{22}$ are also discussed together with the Doleschall-type Coulomb correction.