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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 |
| Publicado: |
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 |
| _version_ | 1780953991849443328 |
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| author | Giovannini, Massimo |
| author_facet | Giovannini, Massimo |
| author_sort | Giovannini, Massimo |
| collection | CERN |
| description | 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 that the tensor to scalar ratio is bounded from below by the dominance of the adiabatic contribution and it cannot be smaller than one thousands whenever the magnetogenesis is driven by a single inflaton field. |
| id | cern-2260349 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2017 |
| record_format | invenio |
| spelling | cern-22603492023-03-14T19:36:46Zdoi:10.1016/j.physletb.2017.05.093http://cds.cern.ch/record/2260349engGiovannini, MassimoTensor to scalar ratio from single field magnetogenesishep-thParticle Physics - Theoryhep-phParticle Physics - Phenomenologygr-qcGeneral Relativity and Cosmologyastro-ph.COAstrophysics and AstronomyThe 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 that the tensor to scalar ratio is bounded from below by the dominance of the adiabatic contribution and it cannot be smaller than one thousands whenever the magnetogenesis is driven by a single inflaton field.arXiv:1703.10488oai:cds.cern.ch:22603492017-03-30 |
| spellingShingle | hep-th Particle Physics - Theory hep-ph Particle Physics - Phenomenology gr-qc General Relativity and Cosmology astro-ph.CO Astrophysics and Astronomy Giovannini, Massimo Tensor to scalar ratio from single field magnetogenesis |
| title | Tensor to scalar ratio from single field magnetogenesis |
| title_full | Tensor to scalar ratio from single field magnetogenesis |
| title_fullStr | Tensor to scalar ratio from single field magnetogenesis |
| title_full_unstemmed | Tensor to scalar ratio from single field magnetogenesis |
| title_short | Tensor to scalar ratio from single field magnetogenesis |
| title_sort | tensor to scalar ratio from single field magnetogenesis |
| topic | hep-th Particle Physics - Theory hep-ph Particle Physics - Phenomenology gr-qc General Relativity and Cosmology astro-ph.CO Astrophysics and Astronomy |
| url | https://dx.doi.org/10.1016/j.physletb.2017.05.093 http://cds.cern.ch/record/2260349 |
| work_keys_str_mv | AT giovanninimassimo tensortoscalarratiofromsinglefieldmagnetogenesis |