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Heavy fields, reduced speeds of sound and decoupling during inflation
We discuss and clarify the validity of effective single field theories of inflation obtained by integrating out heavy degrees of freedom in the regime where adiabatic perturbations propagate with a suppressed speed of sound. We show by construction that it is indeed possible to have inflationary bac...
| Autores principales: | , , , , , |
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| Lenguaje: | eng |
| Publicado: |
2012
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.86.121301 http://cds.cern.ch/record/1446088 |