skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Equilateral non-Gaussianity from heavy fields

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.

Authors:
;  [1];  [2]
  1. Asia Pacific Center for Theoretical Physics, Pohang 790-784 (Korea, Republic of)
  2. Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)
Publication Date:
OSTI Identifier:
22369914
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2013; Journal Issue: 11; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; INFLATIONARY UNIVERSE; INTERACTIONS; NONLINEAR PROBLEMS; SCALAR FIELDS

Citation Formats

Gong, Jinn-Ouk, Pi, Shi, and Sasaki, Misao. Equilateral non-Gaussianity from heavy fields. United States: N. p., 2013. Web. doi:10.1088/1475-7516/2013/11/043.
Gong, Jinn-Ouk, Pi, Shi, & Sasaki, Misao. Equilateral non-Gaussianity from heavy fields. United States. https://doi.org/10.1088/1475-7516/2013/11/043
Gong, Jinn-Ouk, Pi, Shi, and Sasaki, Misao. 2013. "Equilateral non-Gaussianity from heavy fields". United States. https://doi.org/10.1088/1475-7516/2013/11/043.
@article{osti_22369914,
title = {Equilateral non-Gaussianity from heavy fields},
author = {Gong, Jinn-Ouk and Pi, Shi and Sasaki, Misao},
abstractNote = {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.},
doi = {10.1088/1475-7516/2013/11/043},
url = {https://www.osti.gov/biblio/22369914}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 11,
volume = 2013,
place = {United States},
year = {Fri Nov 01 00:00:00 EDT 2013},
month = {Fri Nov 01 00:00:00 EDT 2013}
}