Symmetries in nonlinear Bethe-Heitler process

Abstract

Nonlinear Bethe-Heitler process in a bichromatic laser field is investigated using strong-field QED formalism. Symmetry properties of angular distributions of created $e^{-}{e}^{+}$ pairs are analyzed. These properties are showed to be governed by a behavior of the vector potential characterizing the laser field, rather than by the respective electric field component.

Comments: 4 pages, 4 figures