title: Enhanced subthreshold e+ e- production in short laser pulses.
abstract: The emission of e+ e- 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 the case of moderate laser pulse intensities.
authors.affiliation: Institute of Laser Engineering, Yamada-oka, Suita, Osaka 565-0871, Japan.
authors.forename: A I
authors.initials: AI
authors.lastname: Titov
authors.forename: H
authors.initials: H
authors.lastname: Takabe
authors.forename: B
authors.initials: B
authors.lastname: Kämpfer
authors.forename: A
authors.initials: A
authors.lastname: Hosaka