Large non-Gaussianity from two-component hybrid inflation

Byrnes C, Choi K-Y, Hall LMH (2009)
JCAP 2009(02): 017.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Byrnes, ChristianUniBi; Choi, Ki-Young; Hall, Lisa M. H.
Abstract / Bemerkung
We study the generation of non-Gaussianity in models of hybrid inflation withtwo inflaton fields, (2-brid inflation). We analyse the region in the parameterand the initial condition space where a large non-Gaussianity may be generatedduring slow-roll inflation which is generally characterised by a large f_NL,tau_NL and a small g_NL. For certain parameter values we can satisfytau_NL>>f_NL^2. The bispectrum is of the local type but may have a significantscale dependence. We show that the loop corrections to the power spectrum andbispectrum are suppressed during inflation, if one assume that the fieldsfollow a classical background trajectory. We also include the effect of thewaterfall field, which can lead to a significant change in the observablesafter the waterfall field is destabilised, depending on the couplings betweenthe waterfall and inflaton fields.
Erscheinungsjahr
2009
Zeitschriftentitel
JCAP
Band
2009
Ausgabe
02
Seite(n)
017
ISSN
1475-7516
eISSN
1475-7516
Page URI
https://pub.uni-bielefeld.de/record/2316838

Zitieren

Byrnes C, Choi K-Y, Hall LMH. Large non-Gaussianity from two-component hybrid inflation. JCAP. 2009;2009(02):017.
Byrnes, C., Choi, K. - Y., & Hall, L. M. H. (2009). Large non-Gaussianity from two-component hybrid inflation. JCAP, 2009(02), 017. https://doi.org/10.1088/1475-7516/2009/02/017
Byrnes, C., Choi, K. - Y., and Hall, L. M. H. (2009). Large non-Gaussianity from two-component hybrid inflation. JCAP 2009, 017.
Byrnes, C., Choi, K.-Y., & Hall, L.M.H., 2009. Large non-Gaussianity from two-component hybrid inflation. JCAP, 2009(02), p 017.
C. Byrnes, K.-Y. Choi, and L.M.H. Hall, “Large non-Gaussianity from two-component hybrid inflation”, JCAP, vol. 2009, 2009, pp. 017.
Byrnes, C., Choi, K.-Y., Hall, L.M.H.: Large non-Gaussianity from two-component hybrid inflation. JCAP. 2009, 017 (2009).
Byrnes, Christian, Choi, Ki-Young, and Hall, Lisa M. H. “Large non-Gaussianity from two-component hybrid inflation”. JCAP 2009.02 (2009): 017.

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arXiv: 0812.0807

Inspire: 804281

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