The effective interaction force between positron and electron in a pulsed laser field

Outside the framework of the dipole approximation (with an accuracy of about v/c) the average effective force of interaction of nonrelativistic electron and positron moving towards each other in the pulsed field of one laser wave perpendicularly to the initial particles is theoretically studied. Due to the pulsed external field the compensation effect of the attraction force between the particles is obtained.