TABLE I: The triton and $^{4}$He binding energies B (MeV), and doublet scattering length $^{2}$a$_{nd}$ (fm) calculated using the AV18 and the N3LO-Idaho two-nucleon potentials, and the AV18+URIX, AV18+TM’ and N3LO-Idaho+N2LOL two- and three-nucleon interactions. The experimental values are given in the last row. TABLE II: Mean values of the triton kinetic energy and the two-nucleon potential energy V (2 N ), and the attractive, V$_{A}$ (3 N ), and repulsive, V$_{R}$ (3 N ), contributions of the TNF to the triton binding energy using the AV18+TM’ potential for the specified values of the parameters and with a = − 0 . 87 m − 1 π . In the last two columns B ( $^{4}$He) and $^{2}$a$_{nd}$ are given respectively. The experimental values are given in the last row. Potential B ( $^{3}$H) B ( $^{4}$He) $^{2}$a$_{nd}$ AV18 7.624 24.22 1.258 N3LO-Idaho 7.854 25.38 1.100 AV18+TM’ 8.440 28.31 0.623 AV18+URIX 8.479 28.48 0.578 N3LO-Idaho+N2LOL 8.474 28.37 0.675 Exp. 8.482 28.30 0.645 ± 0.003 ± 0.007 b d c$_{E}$ Λ T V (2 N ) V$_{A}$ (3 N ) V$_{R}$ (3 N ) B ( $^{4}$He) $^{2}$a$_{nd}$ [ m − 3 π ] [ m − 3 π ] [ m$_{π}$ ] [MeV] [MeV] [MeV] [MeV] [MeV] [fm] -2.580 -0.753 0.0 4.8 50.708 -58.144 -1.039 0.0 28.52 0.596 -8.256 -4.690 1.0 4.0 50.317 -57.366 -2.206 0.781 28.30 0.644 -3.870 -3.375 1.6 4.8 50.699 -57.641 -2.748 1.215 28.38 0.644 -2.064 -2.279 2.0 5.6 50.998 -57.940 -2.814 1.291 28.44 0.640 Exp. 28.30 0.645 ± 0.003 ± 0.007 20