Resonant photoproduction of high-energy electron-positron pairs in the field of a nucleus and a plane electromagnetic wave

Abstract

The resonant photoproduction of ultrarelativistic electron-positron pairs (PPP) in a nuclear field and a weak laser field is theoretically studied. Under resonance conditions, the intermediate virtual electron (positron) in the laser field becomes a real particle. As a result, the initial process of the second order in the fine structure constant in the laser field effectively reduces into two successive processes of the first order: single-photon production of electron-positron pair in a laser field (laser-stimulated Breit-Wheeler process) and laser-assisted process of electron (positron) scattering on a nucleus. Resonant kinematics of PPP is studied in details. It is shown that for the considered laser intensities resonance is possible only for the initial photon energies greater than the characteristic threshold energy. At the same time, the ultrarelativistic electron and positron propagate in a narrow cone along the direction of the initial photon momentum. The resonant energy of the positron (electron) can has two values for each radiation angle which varies from zero to some maximum value determined by the energy of the initial photon and the threshold energy. Resonant differential cross section of the studied process was obtained. It is shown that the resonant differential cross section of the PPP can significantly exceed the corresponding cross section of the PPP without an external field. The project calculations may be experimentally verified by the scientific facilities of pulsed laser radiation (SLAC, FAIR, XFEL, ELI, XCELS)

arXiv comment11 pages, 8 figures

References in corpus (6)

• Extremely high-intensity laser interactions with fundamental quantum systems
• Effect of a strong laser field on $e^{+}{e}^{-}$ photoproduction by relativistic nuclei
• Analytic description of elastic electron-atom scattering in an elliptically polarized laser field
• Rescattering effects in laser-assisted electron-atom bremsstrahlung
• Resonant parametric interference effect in spontaneous bremsstrahlung of an electron in the field of a nucleus and two pulsed laser waves
• High-energy bremsstrahlung on atoms in a laser field

Cited by in corpus (8)

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• Resonant high-energy bremsstrahlung of ultrarelativistic electrons in the field of a nucleus and a pulsed light wave
• Muon pair production via $e^{+}{e}^{-}$ annihilation in the presence of a circularly polarized laser field
• The generation of narrow ultrarelativistic beams of positrons (electrons) in the process of resonant photogeneration of pairs on nuclei in a strong electromagnetic field
• Production of Higgs boson in association with a pair of fermions in the presence of a circularly polarized laser field
• Soft photon approximation in a laser field
• Resonant amplification of a relativistic electron bremsstrahlung on an atom in the undulator field