Séminaire / Seminar GReCO |
| « Slow roll-inflation at next-to-next-to-next to leading order (N3LO) » |
|
Pierre Auclair |
| The next generation of cosmological observations will be sensitive to small deviations from a pure power law in the primordial power spectrum of the curvature perturbations. In the context of slow-roll inflation, these deviations are expected and correspond to the so-called running of the spectral index. Their measurement would bring as much information as the discovery of deviations from scale invariance. However, robust parameter inference requires to marginalize over any possible higher order uncertainties, which have been, up to now, not fully determined. In this seminar, I present the calculation of the inflationary scalar and tensor slow-roll power spectra at next-to-next-to-next to leading order (N3LO), fully expanded around an observable pivot wavenumber. I will go thoroughly through all the technicalities and subtleties of the computation and explain in which respect our approach improves on previous attempts. |
|
lundi 21 novembre 2022 - 11:00 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |