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arXiv · 1306.3691

Equilateral non-Gaussianity from heavy fields

Jinn-Ouk Gong·Shi Pi·Misao Sasaki
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Abstract

The effect of self-interactions of heavy scalar fields during inflation on the primordial non-Gaussianity is studied. We take a specific constant-turn quasi-single field inflation as an example. We derive an effective theory with emphasis on non-linear self-interactions of heavy fields and calculate the corresponding non-Gaussianity, which is of equilateral type and can be as relevant as those computed previously in the literature. We also derive the non-Gaussianity by directly using the in-in formalism, and verify the equivalence of these two approaches.

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Jinn-Ouk Gong, Shi Pi, Misao Sasaki. 2013-06-16. Equilateral non-Gaussianity from heavy fields. https://doi.org/10.1088/1475-7516%2F2013%2F11%2F043

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