Spectral index and running of g{sub NL} from an isocurvature scalar field

Journal Article · Fri Apr 01 04:00:00 EDT 2011 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2011/04/010· OSTI ID:22277837

Huang, Qing-Guo ^[1]

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1. Kavli Institute for Theoretical Physics China (KITPC), Key Laboratory of Frontiers in Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190 (China)

It is possible that the primordial non-Gaussianity is dominated by the higher order terms, such as that set by g{sub NL}, not f{sub NL}. In this paper we re-derive the spectral index and work out the running of g{sub NL} from a single isocurvature scalar field. The scale dependences of non-Gaussianity parameters are detectable if the mass of isocurvature field is not too small compared to the Hubble parameter during inflation. In addition, we also apply our results to investigate the curvaton model with near quadratic potential in detail.

• OSTI ID: 22277837
• Journal Information: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 04 Vol. 2011; ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
COMPARATIVE EVALUATIONS
COSMOLOGY
INFLATIONARY UNIVERSE
INFLATONS
MASS
POTENTIALS
SCALAR FIELDS