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Title: Non-gaussianity with Lagrange multiplier field in the curvaton scenario

Abstract

In this paper, we will use δN-formalism to calculate the primordial curvature perturbation for the curvaton model with a Lagrange multiplier field. We calculate the non-linearity parameters f{sub NL} and g{sub NL} in the sudden-decay approximation in this kind of model, and we find that one could get a large non-Gaussinity even if the curvaton dominates the total energy density before it decays, and this property will make the curvaton model much richer. We also calculate the probability density function of the primordial curvature perturbation in the sudden-decay approximation, as well as some moments of it.

Authors:
;  [1]
  1. Shanghai United Center for Astrophysics (SUCA), Shanghai Normal University, 100 Guilin Road, Shanghai 200234, P.R.China (China)
Publication Date:
OSTI Identifier:
22275357
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2010; Journal Issue: 10; 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; APPROXIMATIONS; COSMOLOGICAL MODELS; COSMOLOGY; DECAY; DISTURBANCES; ENERGY DENSITY; PROBABILITY DENSITY FUNCTIONS

Citation Formats

Feng, Chao-Jun, and Li, Xin-Zhou. Non-gaussianity with Lagrange multiplier field in the curvaton scenario. United States: N. p., 2010. Web. doi:10.1088/1475-7516/2010/10/027.
Feng, Chao-Jun, & Li, Xin-Zhou. Non-gaussianity with Lagrange multiplier field in the curvaton scenario. United States. https://doi.org/10.1088/1475-7516/2010/10/027
Feng, Chao-Jun, and Li, Xin-Zhou. 2010. "Non-gaussianity with Lagrange multiplier field in the curvaton scenario". United States. https://doi.org/10.1088/1475-7516/2010/10/027.
@article{osti_22275357,
title = {Non-gaussianity with Lagrange multiplier field in the curvaton scenario},
author = {Feng, Chao-Jun and Li, Xin-Zhou},
abstractNote = {In this paper, we will use δN-formalism to calculate the primordial curvature perturbation for the curvaton model with a Lagrange multiplier field. We calculate the non-linearity parameters f{sub NL} and g{sub NL} in the sudden-decay approximation in this kind of model, and we find that one could get a large non-Gaussinity even if the curvaton dominates the total energy density before it decays, and this property will make the curvaton model much richer. We also calculate the probability density function of the primordial curvature perturbation in the sudden-decay approximation, as well as some moments of it.},
doi = {10.1088/1475-7516/2010/10/027},
url = {https://www.osti.gov/biblio/22275357}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 10,
volume = 2010,
place = {United States},
year = {Fri Oct 01 00:00:00 EDT 2010},
month = {Fri Oct 01 00:00:00 EDT 2010}
}