Cosmology Seminar: Jose Pinto-Vieira

Jose Pinto-Vieira is a PhD student at the University of Sussex.

Can power spectrum observations rule out slow-roll inflation?

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.


Bridget Falck and Emil Rivera-Thorsen
Published Sep. 28, 2017 12:55 PM - Last modified Oct. 31, 2017 11:25 PM