CP3 Journal Club: Can power spectrum observations rule out slow-roll inflation?

Who: Jose Vieira (University of Sussex)
When: Friday, October 27, 2017 at 12:00
Where: The CP³ meeting room

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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 any future measurements of a constant running (or running of the running) of the spectral index is very unlikely to achieve this, although there is some margin for falsifying the assumed class of models with the running of the running if information on a wider range of scales is gathered.