2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/182117The AGS equations are solved for $n{}^3\mathrm{H}$ and $p{}^3\mathrm{He}$ scattering including the Coulomb interaction. Comparison with previous work confirms the accuracy of the calculation and helps clarify a number of issues related to the $n{}^3\mathrm{H}$ total cross section at the peak of the resonance region, as well as an $A_y$ deficiency in $p{}^3\mathrm{He}$. Calculations are fully converged in terms of $NN$ partial waves and involve no uncontrolled approximations.To be published in proceedings of the 18th International IUPAP Conference on Few-Body Problems in Physics, Santos, 21-26 August 2006Nuclear Theorytext