We provide strong evidence for universality of the inflationary field range: given an accurate measurement of (ns,r), one can infer Δφ in a model-independent way in the sub-Planckian regime for a range of universality classes of inflationary models. Both the tensor-to-scalar ratio as well as the spectral tilt are essential for the field range. Given the Planck constraints on ns, the Lyth bound is strengthened by two orders of magnitude: whereas the original bound gives a sub-Planckian field range for r2×10-3, we find that ns=0.96 brings this down to r2×10-5.
Lyth bound of inflation with a tilt
Scalisi M.
Co-primo
;
2014-01-01
Abstract
We provide strong evidence for universality of the inflationary field range: given an accurate measurement of (ns,r), one can infer Δφ in a model-independent way in the sub-Planckian regime for a range of universality classes of inflationary models. Both the tensor-to-scalar ratio as well as the spectral tilt are essential for the field range. Given the Planck constraints on ns, the Lyth bound is strengthened by two orders of magnitude: whereas the original bound gives a sub-Planckian field range for r2×10-3, we find that ns=0.96 brings this down to r2×10-5.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
