Time-dependent Born-series calculations are carried out for various short and long range three-body scattering systems. The long range system is a standard s-wave model for electron-atom scattering developed by Temkin @Phys. Rev. 126, 130 ~1962!# and Poet @J. Phys. B 11, 3081 ~1978!#. A direct solution of the timedependent Schrödinger equation yields exact excitation and ionization cross sectio...

The sensitivity of the deuteron and of pp scattering to the πNN and ρNN coupling constants is investigated systematically. We find that the deuteron can be described about equally well with either large π and ρ or small π and ρ coupling constants. However, pp scattering clearly requires the strong ρ, but favors the weak π (particularly, in 3P0 at low energies). This apparent contradiction betwe...