Enhanced subthreshold electron-positron production in short laser pulses [PDF]
A. I. Titov, H. Takabe, B. Kampfer, A. HosakaThe 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.View original: http://arxiv.org/abs/1205.3880
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