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Tensor to scalar ratio from single field magnetogenesis
The tensor to scalar ratio is affected by the evolution of the large-scale gauge fields potentially amplified during an inflationary stage of expansion. After deriving the exact evolution equations for the scalar and tensor modes of the geometry in the presence of dynamical gauge fields, it is shown...
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| Lenguaje: | eng |
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2017
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| Acceso en línea: | https://dx.doi.org/10.1016/j.physletb.2017.05.093 http://cds.cern.ch/record/2260349 |