Elastic proton scattering on tritium below the n-${}^{3}He$ threshold

Elastic proton scattering on ${}^{3}H$ nucleus is studied inbetween p-% ${}^{3}H$ and n-${}^{3}He$ thresholds, in the energy region where $\alpha$-particles first excited state is inbeded in the continuum. For this aim Faddeev-Yakubovski equations are solved in configuration space, fully considering effects due to the isospin breaking as well as rigorously treating Coulomb interaction. Different realistic nuclear Hamiltonians are tested, elucidating open problems in nuclear interaction description.