Relativistic scattering amplitude of three particles in the eikonal approximation

Expression for the relativistic three-particle scattering amplitude in the eikonal approximation is derived on the basis of the solution of the quasipotential type equation. All possible pair interactions as well as three-particle forces are taken into account. The expression obtained is very different from the analogous formal solution of Faddeev equations, which was used earlier for investigation of inclusive processes.