Fermion production during preheating after hybrid inflation
At the end of inflation, the coherent oscillations of the inflation field may resonantly amplify the long wavelength modes of both bosons and fermions coupled to it. We study the resonant production of both kinds of particles during preheating in a model of hybrid inflation. The coherent time evolut...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2000 |
| País: | Argentina |
| Institución: | Universidad Nacional de La Plata |
| Repositorio: | SEDICI (UNLP) |
| Idioma: | inglés |
| OAI Identifier: | oai:sedici.unlp.edu.ar:10915/130977 |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/130977 |
| Access Level: | acceso abierto |
| Palabra clave: | Ciencias Exactas Cosmology of Theories beyond the SM Physics of the Early Universe |
| Sumario: | At the end of inflation, the coherent oscillations of the inflation field may resonantly amplify the long wavelength modes of both bosons and fermions coupled to it. We study the resonant production of both kinds of particles during preheating in a model of hybrid inflation. The coherent time evolution of the inflation and the Higgs fields after inflation induce a very different production of fermions depending on whether they are coupled to the Higgs or to the inflation. For reasonable values of the model parameters, the fermion production through parametric resonance can be very efficient. We study the relative growth of the fermion and boson energy densities during preheating in hybrid models. During the initial stage of preheating, fermion production dominates the relative energy density, while the exponential growth of bosonic modes soon takes over. |
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