Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-04-19
Physics
High Energy Physics
High Energy Physics - Phenomenology
PhD thesis, 162 pages, 9 figures
Scientific paper
In this work I studied the production of particles (electron-positron pairs and photons) in the presence of overcritic ($\gg 4.4\cdot 10^{13} \text{gauss}$) slowly varying magnetic fields. The calculations are performed in the framework of QED in the presence of external not quantized electromagnetic fields by means of the adiabatic perturbation theory. Also, since such strong magnetic fields may be present near astrophysical compact objects where gamma-ray bursts (GRB) are thought to be generated, I tried to reproduce theoretically some features of the GRB energy spectra such as the low energy ($\lesssim 0.1 \text{MeV}$) behaviour. Also, having in mind this astrophysical scenario, I took into account the effects of a weak and of a strong gravitational field on the production probabilities previously calculated in the flat Minkowski spacetime.
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