Abstract
Electron-positron pair production by the Breit-Wheeler process embedded in a strong laser pulse is analyzed. The transverse momentum spectrum displays prominent peaks which are interpreted as caustics, the positions of which are accessible by the stationary phases. Examples are given for the superposition of an XFEL beam with an optical high-intensity laser beam. Such a configuration is available, e.g., at LCLS at present and at European XFEL in near future. It requires a counter propagating probe photon beam with high energy which can be generated by synchronized inverse Compton backscattering.
Highlights
Pair production processes in electromagnetic interactions are of permanent interest due to fundamental aspects to be addressed up to technological relevance for material investigations
Electron-positron pair production by the Breit-Wheeler process embedded in a strong laser pulse is analyzed
The transverse momentum spectrum displays prominent peaks which are interpreted as caustics, the positions of which are accessible by the stationary phases
Summary
Pair production processes in electromagnetic interactions are of permanent interest due to fundamental aspects to be addressed up to technological relevance for material investigations. Here, very strong non-linear effects due to an ultra-high intensity laser beam are required for enabling the this laser-assisted Breit-Wheeler pair production. Accounting for quantum interference effects for the emission from different locations of the quasi-classical electron motion in the laser field along a temporally changing figure-8 trajectory, the gross features of the complicated spectrum become accessibly Such an interpretation is in the spirit of [13], where the spectrum of pairs produced in a strong external field is explained as redistribution in phase space following the production process (which can be approximated by a temporarily constant cross-field probability) and keeping interference effects.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
