Enhanced subthreshold electron-positron production in short laser pulses
arXiv:1205.3880 · doi:10.1103/PhysRevLett.108.240406
Abstract
The emission of electron-positron pairs off a probe photon propagating through a polarized short-pulsed electromagnetic (e.g.\ laser) wave field is analyzed. A significant increase of the total cross section of pair production in the subthreshold region is found for decreasing laser pulse duration even in case of moderate laser pulse intensities.
4 pages, 2 figures
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