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Jul 26 – 30, 2021
Europe/Berlin timezone

Probing primordial features with the Stochastic Gravitational Wave Background

Jul 28, 2021, 9:30 AM


Parallel session talk Cosmology T02: Cosmology


Jacopo Fumagalli (IAP)


High energy embeddings of inflation often lead to departures from the single-field slow-roll paradigm, resulting in features in the primordial scalar power spectrum. Probing these features could, for instance, establish the existence of heavy particles beyond the reach of terrestrial experiments, and even test the inflationary paradigm or point to alternatives to it. To date, observational constraints and prospects for detection have concentrated on the CMB and Large Scale Structure surveys. 
In this talk, I will show how features in the primordial spectrum lead to characteristic oscillatory patterns in the stochastic gravitational wave background. This provides a clear target for gravitational wave observatories as well as a challenge for developing dedicated data analysis techniques to look for these unique insights into the physics of the early universe.

Collaboration / Activity Theory / Observation
First author Jacopo Fumagalli

Primary author


Mr Lukas Witkowski (IAP) Sébastien Renaux-Petel (Institut d'Astrophysique de Paris)

Presentation materials