File(s) not publicly available
Non-Gaussianity beyond slow roll in multi-field inflation
journal contribution
posted on 2023-06-08, 13:39 authored by Christian ByrnesChristian Byrnes, Gianmassimo TasinatoWe study the non-Gaussianity generated during multiple-field inflation. We provide an exact expression for the bispectrum parameter fNL which is valid beyond the slow-roll regime, valid for certain classes of inflationary models. We then study a new, exact multi-field inflationary model considering a case where the bispectrum grows to observable values at the end of inflation. We show that in this case the trispectrum is also large and may even provide the dominant signal of non-Gaussianity
History
Publication status
- Published
Journal
Journal of Cosmology and Astroparticle PhysicsISSN
1475-7516External DOI
Issue
08Volume
2009Page range
016-016Department affiliated with
- Physics and Astronomy Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2012-11-14Usage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC