Events

Date: 27 May 2025   Time: 14:00 - 15:00

Location: MB503

Identifying useful flat-space limits of cosmological correlators—defined on the future boundary of de Sitter space—is challenging due to their inherent scale invariance. In this talk, I present a massive flat-space limit in which cosmological correlators arising from the exchange of heavy fields can be expressed in terms of massive Feynman diagrams in Minkowski space. As a phenomenological application, I use this limit to compute the imprints of massive particles during inflation on primordial non-Gaussianity. These results offer new channels for discovering inflation-era particles with the next generation of CMB and large-scale structure surveys, such as Simons Observatory and SPHEREx.