Charge symmetry breaking effect for $^3$H and $^3$He within $s$-wave approach

Three-nucleon systems are considered under the assumption that neutrons and protons are to be distinguishable. The configuration space Faddeev equations are used to calculate ground state energies of $^3$H and $^3$He nuclei within $s$-wave approach applying the Malfliet-Tjon MT I-III potential. We modify the potential to define $nn$ and $pp$ singlet components. Numerical evaluation for the charge symmetry breaking energy is done. Results obtained are compared with previous predictions.