Speaker
Dr
Shuntaro Aoki
Description
Modular symmetry arises in various extensions of the Standard Model and plays an important role in particle phenomenology. In this talk, I explore its cosmological implications from the perspectives of inflation and cosmological collider physics. Modular inflation models lead to multi-field dynamics and characteristic primordial signatures, while modular extensions generically predict heavy states that can be probed through cosmological collider signals in non-Gaussianities. This provides a novel way to test modular symmetry in the early Universe.
