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A: Fachverband Atomphysik

A 34: Poster II

A 34.34: Poster

Donnerstag, 5. März 2009, 16:30–19:00, VMP 9 Poster

Multiphoton pair creation by relativistic proton and muon impact on intense laser beams — •Sarah Müller, Huayu Hu, Tim-Oliver Müller, and Carsten Müller — Max-Planck-Institut für Kernphysik, Heidelberg

Electron-positron pair production in combined laser and Coulomb fields is studied, with a focus on recoil effects. To this end, the Feynman diagram for multiphoton pair creation by muon impact on an x-ray laser beam is evaluated within the framework of laser-dressed quantum electrodynamics employing relativistic Volkov states. The result is compared with the known expression for multiphoton pair production by a proton which is treated as an external Coulomb field. In the limit of low laser intensity, both approaches are shown to coincide. The recoil distribution is calculated numerically and its dependence on the projectile mass is discussed.