Large Primordial Trispectra in General Single Field Inflation
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Chen_Large primordial.pdf
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Author(s)
Chen, Xingang
Hu, Bin
Huang, Min-xin
Shiu, Gary
Wang, Yi
Date Issued
August 2009
Journal
Journal of Cosmology and Astroparticle Physics
Publisher
Institute of Physics Publishing
Citation
Chen, Xingang, Bin Hu, Min-xin Huang, Gary Shiu and Yi Wang. “Large primordial trispectra in general single field inflation.” Journal of Cosmology and Astroparticle Physics 2009.08 (2009): 008.
Version
Author's final manuscript
Abstract
We compute the large scalar four-point correlation functions in general single field inflation models, where the inflaton Lagrangian is an arbitrary function of the inflaton and its first derivative. We find that the leading order trispectra have four different shapes determined by three parameters. We study features in these shapes that can be used to distinguish among themselves, and between them and the trispectra of the local form. For the purpose of data analyses, we give two simple representative forms for these ``equilateral trispectra''. We also study the effects on the trispectra if the initial state of inflation deviates from the standard Bunch-Davies vacuum.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
http://dx.doi.org/10.1088/1475-7516/2009/08/008
