Simplifying the EFT of Inflation: Generalized Disformal Transformations and Redundant Couplings
(21 pages)

By performing disformal transformation, which do not affect the latetime cosmological observables, it is shown that 6 of the 17 LO free functions in the EFT of Inflation are redundant. AT NLO, a further 6 transformations can be used to remove higherderivative terms.

This has interesting implications for the correlations functionsfor example, the tensortensortensor correlation is not modified at LO. These kinds of disformal field redefinitions will be useful for future EFT modelbuilding, removing redundant operators from the Lagrangian.
