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Seminars

Seminar
FIELD Phys:Particle Physics
DATE August 16 (Wed), 2017
TIME 16:00-17:30
PLACE 1423
SPEAKER Hayden Lee
HOST Ko, Pyungwon
INSTITUTE Cambridge University
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.
FILE 57071502959466840_1.pdf
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