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HK: Physik der Hadronen und Kerne

HK 6: Theory II

HK 6.3: Talk

Monday, March 8, 2004, 16:45–17:00, E

Particle production in space-time dependent fields — •Dennis Dietrich — Laboratoire de Physique Théorique, Bâtiment 210, Université Paris XI, 91405 Orsay Cedex, France

The exact retarded propagators of particles in classical space-time dependent gauge fields is derived by solving the equations of motion for the Green’s functions with corresponding boundary conditions. From the retarded propagators obtained in this way, the momentum spectrum for pairs produced by vacuum polarisation is calculated. Different approximations and the exact solution for the Green’s functions and the momentum spectra are presented.