University of Sussex
Browse

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 Tasinato
We 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 Physics

ISSN

1475-7516

Issue

08

Volume

2009

Page range

016-016

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-11-14

Usage metrics

    University of Sussex (Publications)

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC