ORCID
- King, B.: 0000-0003-4489-8468
Abstract
We consider the absorption of probe photons by electrons in the presence of an intense, pulsed, background field. Our analysis reveals an interplay between regularisation and gauge invariance which distinguishes absorption from its crossing-symmetric processes, as well as a physical interpretation of absorption in terms of degenerate processes in the weak field limit. In the strong field limit we develop a locally constant field approximation (LCFA) for absorption which also exhibits new features. We benchmark the LCFA against exact analytical calculations and explore its regime of validity. Pulse shape effects are also investigated, as well as infra-red and collinear limits of the absorption process.
DOI
10.1103/PhysRevD.100.076002
Publication Date
2019-10-07
Publication Title
Physical Review D: Particles, Fields, Gravitation and Cosmology
ISSN
1550-2368
Embargo Period
2019-12-18
Organisational Unit
School of Engineering, Computing and Mathematics
Keywords
hep-ph, physics.plasm-ph
Recommended Citation
Ilderton, A., King, B., & Macleod, A. (2019) 'Absorption cross section in an intense plane wave background', Physical Review D: Particles, Fields, Gravitation and Cosmology, . Available at: https://doi.org/10.1103/PhysRevD.100.076002
