Vieira, J P P, Byrnes, Christian T and Lewis, Antony (2018) Can power spectrum observations rule out slow-roll inflation? Journal of Cosmology and Astroparticle Physics. ISSN 1475-7516
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Abstract
The spectral index of scalar perturbations is an important observable that allows us to learn about inflationary physics. In particular, a detection of a significant deviation from a constant spectral index could enable us to rule out the simplest class of inflation models. We investigate whether future observations could rule out canonical single-field slow- roll inflation given the parameters allowed by current observational constraints. We find that future measurements of a constant running (or running of the running) of the spectral index over currently available scales are unlikely to achieve this. However, there remains a large region of parameter space (especially when considering the running of the running) for falsifying the assumed class of slow-roll models if future observations accurately constrain a much wider range of scales.
Item Type: | Article |
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Schools and Departments: | School of Mathematical and Physical Sciences > Physics and Astronomy |
Subjects: | Q Science > QB Astronomy |
Depositing User: | Billy Wichaidit |
Date Deposited: | 15 Jan 2018 15:16 |
Last Modified: | 15 Jan 2018 15:16 |
URI: | http://sro.sussex.ac.uk/id/eprint/72829 |
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📧 Request an updateProject Name | Sussex Project Number | Funder | Funder Ref |
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Astrophysics and Cosmology - Sussex Consolidated Grant | G1291 | STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL | ST/L000652/1 |