Darmstadt 2008 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 57: Quanteneffekte (QED / Lichtstreuung)

Q 57.3: Talk

Friday, March 14, 2008, 11:30–11:45, 2D

Non-perturbative vacuum-polarization effects in proton-laser collisions — •Antonino Di Piazza, Karen Z. Hatsagortsyan, and Christoph H. Keitel — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg

Merging of laser photons can occur due to the polarization of vacuum in the collision of a high-energy proton beam and an intense laser field [1]. The photon merging rate is calculated by exactly accounting for the laser field which involves a highly non-perturbative dependence on the laser field parameters, namely its intensity and frequency. It is shown that even non-perturbative vacuum-polarization effects could be in principle experimentally measured by combining proton accelerators presently available with the next generation of table-top petawatt lasers.

[1] A. Di Piazza, K. Z. Hatsagortsyan, and C. H. Keitel, Phys. Rev. Lett. (in press). See also arXiv:0708.0475 [hep-ph].