Description
We compare two setups incorporating new massive spinning degrees of freedom during inflation within the framework of the effective field theory of inflation (EFToI). Even though they differ on which symmetries are linearly realised, since they couple to the inflaton, it is possible they yield same signatures on cosmological correlators. We will see that their signatures are the same at bispectrum, but not higher-point correlators. There will also be a portion dedicated to the Feynman rules when calculating the correlators in these setups involving non-dynamical modes.
