Hayden Lee(University of Cambridge)
August 8(Tue) - August 8(Tue), 2017
4:00 pm
CTPU Seminar Room, KAIST Munji Campus
* Speaker : Hayden Lee(University of Cambridge)
* Date : 4:00 pm, August 8 2017
* Place : CTPU Seminar Room, KAIST Munji Campus
* Title : Non-Gaussianity as a Particle Detector
* Abstract : Cosmological correlation functions encode the spectrum of particles during inflation, in analogy to scattering amplitudes in colliders. In this talk, I will discuss the imprints of massive particles with arbitrary spin on cosmological correlators. The spinning case is particularly interesting because the detection of massive higher-spin particles would be indicative of a stringy origin of inflation. I will describe their key spectroscopic features in the scalar and tensor bispectra, and discuss scenarios in which they lead to observable non-Gaussianity.