The system of three three-dimensional charged quantum particles:   asymptotic behavior of the eigenfunctions of the continuous spectrum at   infinity
  The asymptotic behavior in the leading order of the continuous spectrum eigenfunctions $\Psi(\bz,\bq)$ as $|\bz|\rightarrow\infty$ for the system of three three-dimensional charged quantum particles has been obtained on the heuristic level. The equality of the masses and the equality of the absolute values of charges of particles are not crucial for the method. 
V.S.Buslaev, S.B.Levin
math-ph math.MP quant-ph