Dresden 2011 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 26: Poster III

A 26.26: Poster

Donnerstag, 17. März 2011, 16:00–18:30, P2

Multi-Photon Production and Single-Photon Annihilation of Electron-Positron Pairs — •Huayu Hu, Sven Augustin, Carsten Mueller, and Christoph H. Keitel — Max Planck Institute for Nuclear Physics, Heidelberg

Electron-positron pairs can be produced via a multiphoton trident process in the collision of a relativistic electron beam with an intense laser field available nowadays [1]. We have performed a complete laser-dressed QED calculation of this process, and investigate the transition from the perturbative regime to the quasi-static regime [2]. An all-optical setup is proposed for future experiments on laser-induced pair production.

We have also studied a time-reversed process, namely electron-positron annihilation with single-photon emission where the extra momentum is absorbed by a nearby spectator electron. We discuss the significance of this process in dense plasma environments.

[1] D. Burke et al., Phys. Rev. Lett. 79, 1626 (1997).

[2] H. Hu, C. Müller, and C.H. Keitel, Phys. Rev. Lett. 105, 080401 (2010).