1994/05/26 by Jürgen Audretsch, J. Audretsch, Ulf Jasper +3 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #gr-qc
paper · pdf · doi:10.1103/physrevd.49.6576
published as Phys.Rev. D49 (1994) 6576-6586 · 21 pages, to appear in Phys. Rev. D., KONS-RGKU-94-06
arxiv created 1994/05/26 · openalex publication_date 1994/06/15 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In the framework of QED we investigate the bremsstrahlung process for an electron passing by a straight static cosmic string. This process is precluded in empty Minkowski space-time by energy and momentum conservation laws. It happens in the presence of the cosmic string as a consequence of the conical structure of space, in spite of the flatness of the metric. The cross section and emitted electromagnetic energy are computed and analytic expressions are found for different energies of the incoming electron. The energy interval is divided in three parts depending on whether the energy is just above the electron rest mass M, much larger than M, or exceeds \fracM\ensuremathδ, with \ensuremathδ the string mass per unit length in Planck units. We compare our results with those of scalar QED and classical electrodynamics and also with the conical pair production process computed earlier.