Journal article 1189 views
Lyth bound of inflation with a tilt
Juan Garcia-Bellido,
Diederik Roest,
Marco Scalisi,
Ivonne Zavala,
Ivonne Zavala Carrasco 
Physical Review D, Volume: 90, Issue: 12
Swansea University Author:
Ivonne Zavala Carrasco
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DOI (Published version): 10.1103/PhysRevD.90.123539
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 spe...
| Published in: | Physical Review D |
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| Published: |
2014
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa21629 |
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| 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 r≲2⋅10−3, we find that n=0.96 brings this down to r≲2⋅10−5. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
12 |