Absorption cross section in an intense plane wave background

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.

15 pages, 6 pdf figures. V2 updated to match published version

References in corpus (32)

• Experimental evidence of radiation reaction in the collision of a high-intensity laser pulse with a laser-wakefield accelerated electron beam
• Experimental signatures of the quantum nature of radiation reaction in the field of an ultra-intense laser
• Extended PIC schemes for physics in ultra-strong laser fields: review and developments
• Nonlinear Compton scattering in ultra-short laser pulses
• Non-Linear Compton Scattering of Ultrashort and Ultraintense Laser Pulses
• Implementing nonlinear Compton scattering beyond the local constant field approximation
• Measuring Vacuum Polarisation with High Power Lasers
• An extended locally constant field approximation for nonlinear Compton scattering
• Trident pair production in strong laser pulses
• On the Prospect of Studying Nonperturbative QED with Beam-Beam Collisions
• Improved local-constant-field approximation for strong-field QED codes
• Testing numerical implementations of strong field electrodynamics
• Quantum radiation reaction: from interference to incoherence
• Infra-red divergences in plane wave backgrounds
• High-energy behavior of strong-field QED in an intense plane wave
• Note on the conjectured breakdown of QED perturbation theory in strong fields
• The intensity dependent mass shift: existence, universality and detection
• Conjecture of perturbative QED breakdown at $\alpha {\chi }^{2/3}\gtrsim 1$
• Trident pair production in plane waves: Coherence, exchange, and spacetime inhomogeneity
• Reaching supercritical field strengths with intense lasers
• Scattering in plane-wave backgrounds: infra-red effects and pole structure
• Exact final state integrals for strong field QED
• Nonlinear trident pair production in an arbitrary plane wave: a focus on the properties of the transition amplitude
• Single and double nonlinear Compton scattering
• Probing non-perturbative QED with electron-laser collisions
• Letter of Intent for the LUXE Experiment
• Vacuum high harmonic generation in the shock regime
• Laser photon merging in an electromagnetic field inhomogeneity
• Photon merging and splitting in electromagnetic field inhomogeneities
• Laser photon merging in proton-laser collisions
• Second Order QED Processes in an Intense Electromagnetic Field
• Relativistic three-body recombination with the QED vacuum

Cited by in corpus (16)

• Advances in QED with intense background fields
• The locally monochromatic approximation to QED in intense laser fields
• Nonlinear Compton scattering of polarised photons in plane-wave backgrounds
• Polarized QED cascades
• A uniform locally constant field approximation for photon-seeded pair production
• Highly polarised gamma photons from electron-laser collisions
• Pulse envelope effect on nonlinear Compton scattering in electron-laser collisions
• Toward the observation of interference effects in nonlinear Compton scattering
• One-photon pair-annihilation in pulsed plane-wave backgrounds
• The analytic structure of amplitudes on backgrounds from gauge invariance and the infra-red
• Nonlinear photon trident versus double Compton scattering and resummation of one-step terms
• One-loop multicollinear limits from 2-point amplitudes on self-dual backgrounds
• Ultrarelativistic electrons in counterpropagating laser beams
• Self-absorption of synchrotron radiation in a laser-irradiated plasma
• Particle-beam scattering from strong-field QED
• Dominance of $\gamma$-$\gamma$ electron-positron pair creation in a plasma driven by high-intensity lasers