Non-radiative collisions of Langmuir solitons

Abstract Collisions of Langmuir solitons are described in terms of equations of motion for equivalent point particles. The description is valid in the limit when the eigenfrequencies of bound plasmons are much higher than the inverse interaction time, and the velocities of the solitons are much less than the ion-acoustic velocity. It is shown that the velocities of the solitons do not change due to binary collisions but they generally change when more than two solitons collide simultaneously.