The effect of coordinate and momentum uncertainties on collision of   coherent electrons
  We have examined the head-on collision of two electrons in approximation of coherent states. We have shown that the character of collision depends mainly on ratio of initial relative electron's momentum to momentum uncertainty of electrons. When this ratio becomes greater then 1, the Coulomb interaction does not practically influence the scattering. 
C.V. Usenko, V.O. Gnatovskyy and N. A. Cherkashina