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Paper   IPM / P / 16762
School of Physics
  Title:   Non-Gaussianities in the Extended EFT of Inflation
  Author(s): 
1.  A. Ashoorioon
2.  Gh. Geshnizjani
3.  H. J. Kim
  Status:   Preprint
  Journal:
  Year:  2021
  Supported by:  IPM
  Abstract:
In earlier works, we had studied the validity of Extended Effective Field Theory of Inflation (EEFToI) in the regime where initial conditions are set with dispersion relations ω2k6. We had also evaluated and examined the power spectrum for some interesting corners of the parameter space. In this paper we compute the bispectrum in the EEFToI, take a closer look at strong coupling constraints and calculate the size of the non-Gaussianities. We also investigate the shape of triangles that contribute to enhancement of non-Gaussianities in this regime. We find that there are allowed regions of parameter spaces where EEFToI description with initial conditions set with ω2k6 is sensible and interesting.

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