1. High-Energy Recollision Processes of Laser-Generated Electron-Positron Pairs.
- Author
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Meuren, Sebastian, Hatsagortsyan, Karen Z., Keitel, Christoph H., and Di Piazza, Antonino
- Subjects
- *
POSITRONIUM , *EXOTIC atoms , *ELECTRONS , *LASERS , *LIGHT amplifiers - Abstract
Two oppositely charged particles created within a microscopic space-time region can be separated, accelerated over a much larger distance, and brought to a recollision by a laser field. Consequently, new reactions become feasible, where the energy absorbed by the particles is efficiently released. By investigating the laser-dressed polarization operator, we identify a new contribution describing high-energy recollisions experienced by an electron-positron pair generated by pure light when a gamma photon impinges on an intense, linearly polarized laser pulse. The energy absorbed in the recollision process over the macroscopic laser wavelength corresponds to a large number of laser photons and can be exploited to prime high-energy reactions. Thus, the recollision contribution to the polarization operator differs qualitatively and quantitatively from the well-known one, describing the annihilation of an electronpositron pair within the microscopic formation region. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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