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Cosmological Correlators Through the Looking Glass

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If you have a question about this talk, please contact Thomas Colas .

We will discuss parity violation in the early universe and show that simple single-field models of inflation cannot produce parity-violating primordial correlations. To achieve such a signal we therefore need to consider more exotic theories with one intriguing option being the inclusion of addition massive spinning states that can decay into light states and leave parity-violating imprints on late-time observables. We will concentrate on the parity-odd trispectrum generated by the tree-level exchange of new fields and show that if these new fields are in the complementary series of de Sitter representations, the trispectrum is factorised into a combination of bispectra and power spectra for general kinematics. This provides a consistency relation between different cosmological observables. 

This talk is part of the Cosmology Lunch series.

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