[He-sem] Cosmology Seminar TUESDAY JUNE 27

[Andrei Khmelnitsky]

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COSMOLOGY SEMINAR
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TUESDAY, 27 JUNE 2017, 16:30 p.m.
Luigi Stasi Seminar Room - ICTP Leonardo Bldg. 


Hayden LEE
(University of Cambridge, UK)

"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.

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