0 0.5 1 1.5 2 2.5 3 3.5 4 b/b$_{0}$ 0.55 0.6 0.65 2 a nd  [fm] 0 0.5 1 1.5 2 2.5 3 3.5 4 b/b$_{0}$ 0 2 4 6 8 d/d 0 FI G . 2: The doublet scattering length $^{2}$a$_{nd}$ as a function of the parameter b (in units of the ori ginal parameter b$_{0}$ = − 2 . 58 m − 3 π ) of the TM’ potential for different values of the cutoff and the cor responding values of the parameter d (in units of the original parameter d$_{0}$ = − 0 . 753 m − 3 π ), as a f unction of the parameter b , used to reproduce the triton binding energy. 23