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Speaker |
Baloi, Mihaela-Andreea |
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Coauthors |
Cosmin Crucean |
| Talk Title |
Fermion production in early Universe |
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Abstract |
We study the production of fermions in the presence of electric and magnetic fields on de Sitter expanding universe, using perturbation theory. From our results we can extract important physical consequences such as, in the case of electric fields the particles are most probable emitted parallel on the direction of the field, while in the case of magnetic fields, the particles are emitted perpendicular on the direction of the magnetic field. Also our results show that, the processes of particle production are significant in the early Universe when the gravitational fields were very strong. Another important result is the Minkowski limit. It is well known that these QED processes that imply particle production are forbidden on Minkowski space-time because of the simultaneous laws of conservation for energy and momentum. Indeed, when we make the expansion factor zero, our results show that the probabilities became zero as well. |
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