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arXiv · 2110.06038

Non-Gaussianities in the Extended EFT of Inflation

Amjad Ashoorioon·Ghazal Geshnizjani·Hyung J. Kim
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Abstract

In earlier works, we studied the validity of Extended Effective Field Theory of Inflation (EEFToI) in the regime where initial conditions are set with dispersion relations $\omega^2 \propto k^6$. 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 the strong coupling constraints and calculate the size of the non-Gaussianities in those regions of parameter space. We also investigate the shape of triangles that contribute to the enhancement of non-Gaussianities in this regime. We find that there are allowed parts of parameter spaces where EEFToI description with initial conditions set with $\omega^2 \propto k^6$ is sensible and interesting.

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Amjad Ashoorioon, Ghazal Geshnizjani, Hyung J. Kim. 2021-10-12. Non-Gaussianities in the Extended EFT of Inflation. https://doi.org/10.1088/1475-7516%2F2022%2F01%2F046

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