Pair annihilation in laser pulses: Optical versus x-ray free-electron laser regimes
Abstract
We discuss the theory and phenomenology of pair annihilation, within an ultrashort laser pulse, to a single photon. The signature of this process is the unidirectional emission of single photons with a fixed energy. We show that the cross section is significantly larger than for two-photon pair annihilation in vacuum, with x-ray free-electron laser parameters admitting a much clearer signal than optical beams.
- Publication:
-
Physical Review A
- Pub Date:
- September 2011
- DOI:
- arXiv:
- arXiv:1105.3475
- Bibcode:
- 2011PhRvA..84c2119I
- Keywords:
-
- 12.20.Ds;
- 11.15.Tk;
- Specific calculations;
- Other nonperturbative techniques;
- High Energy Physics - Phenomenology;
- High Energy Physics - Theory;
- Physics - Accelerator Physics
- E-Print:
- V2: 5 pages, 4 figures. Published version. Disucssion of optical case extended