Non-Gaussianity from false vacuum inflation: old curvaton scenario

Journal Article · Mon Mar 01 00:00:00 EST 2010 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2010/03/004· OSTI ID:22273003

Gong, Jinn-Ouk ^[1]; Lin, Chunshan ^[2]; Wang, Yi ^[3]

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1. Instituut-Lorentz for Theoretical Physics, Universiteit Leiden, Niels Bohrweg 2, 2333 CA Leiden (Netherlands)
2. Interdisciplinary Center of Theoretical Studies, University of Science and Technology of China, Hefei, Anhui 230026 (China)
3. Department of Physics, McGill University, Montréal, QC, H3A 2T8 (Canada)

We calculate the three-point correlation function of the comoving curvature perturbation generated during an inflationary epoch driven by false vacuum energy. We get a novel false vacuum shape bispectrum, which peaks in the equilateral limit. Using this result, we propose a scenario which we call ''old curvaton''. The shape of the resulting bispectrum lies between the local and the false vacuum shapes. In addition we have a large running of the spectral index.

• OSTI ID: 22273003
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2010, Issue 03; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ASTROPHYSICS
CORRELATION FUNCTIONS
COSMOLOGY
DISTURBANCES
INDEXES
INFLATIONARY UNIVERSE
VACUUM STATES