Benchmark calculation of p-3H and n-3He scattering
  p-3H and n-3He scattering in the energy range above the n-3He but below the d-d thresholds is studied by solving the 4-nucleon problem with a realistic nucleon-nucleon interaction. Three different methods -- Alt, Grassberger and Sandhas, Hyperspherical Harmonics, and Faddeev-Yakubovsky -- have been employed and their results for both elastic and charge-exchange processes are compared. We observe a good agreement between the three different methods, thus the obtained results may serve as a benchmark. A comparison with the available experimental data is also reported and discussed. 
M. Viviani, A. Deltuva, R. Lazauskas, A.C. Fonseca, A. Kievsky, and   L.E. Marcucci
nucl-th nucl-ex