The trispectrum in the multi-brid inflation
Journal Article
·
· Journal of Cosmology and Astroparticle Physics
- School of Physics, Korea Institute for Advanced Study, 207-43, Cheongryangri-Dong, Dongdaemun-Gu, Seoul 130-722 (Korea, Republic of)
The trispectrum is at least as important as the bispectrum and its size can be characterized by two parameters {tau}{sub NL} and g{sub NL}. In this short paper, we focus on the Multi-brid inflation, in particular the two-brid inflation model in arXiv.0805.0974, and find that {tau}{sub NL} is always positive and roughly equals to [(6/5)f{sub NL}]{sup 2} for the low scale inflation, but g{sub NL} can be negative or positive and its order of magnitude can be the same as that of {tau}{sub NL} or even larger.
- OSTI ID:
- 22156987
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 05 Vol. 2009; ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
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