Off-shell variation in the binding energy of triton

Phase-shift-equivalent potentials are used to study the sensitivity of triton binding energy (E _T) to the off-shell behaviour of two-nucleonT matrix in a translationally-invariant basis of harmonic oscillator wavefunction. For a smaller value of inverse range parameterλ (1.95 fm⁻¹), which is close to the attractive range of our model potential, a 21% variation in the triton binding energy is obtained. For the other value ofλ an off-shell variation of about 28% inE _T is obtained.