1-2 pm: Uplifting Massive Graphs from Minkowski to de Sitter
1-2 pm: Uplifting Massive Graphs from Minkowski to de Sitter
- Event time: 12:30pm until 2:30pm
- Event date: 4th June 2025
- Speaker: Sadra Jazayeri (Imperial College London)
- Location: Room 6201, James Clerk Maxwell Building (JCMB), King's Buildings James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB
Event details
Title: Uplifting Massive Graphs from Minkowski to de Sitter
Abstract: 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.
About Particle Physics Theory seminars
The Particle Physics Theory seminar is a weekly series of talks reflecting the diverse interests of the group. Topics include analytic and numerical calculations based on the Standard Model of elementary particle physics, theories exploring new physics, as well as more formal developments in gauge theories and gravity..