Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-11-17
Phys.Rev.Lett.106:020404,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 1 .eps figure. Version 2: reference added, published version
Scientific paper
10.1103/PhysRevLett.106.020404
We calculate the trident pair production amplitude in a strong laser background. We allow for finite pulse duration, while still treating the laser fields nonperturbatively in strong-field QED. Our approach reveals explicitly the individual contributions of the one-step and two-step processes. We also expose the role gauge invariance plays in the amplitudes and discuss the relation between our results and the optical theorem.
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