Scale-dependent non-Gaussianity probes inflationary physics

Byrnes C, Gerstenlauer M, Nurmi S, Tasinoato G, Wands D (2010)
JCAP 2010(10): 004.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Byrnes, ChristianUniBi; Gerstenlauer, M.; Nurmi, S.; Tasinoato, G.; Wands, D.
Abstract / Bemerkung
We calculate the scale dependence of the bispectrum and trispectrum in (quasi) local models of non-Gaussian primordial density perturbations, and characterize this scale dependence in terms of new observable parameters. They can help to discriminate between models of inflation, since they are sensitive to properties of the inflationary physics that are not probed by the standard observables. We find consistency relations between these parameters in certain classes of models. We apply our results to a scenario of modulated reheating, showing that the scale dependence of non-Gaussianity can be significant. We also discuss the scale dependence of the bispectrum and trispectrum, in cases where one varies the shape as well as the overall scale of the figure under consideration. We conclude providing a formulation of the curvature perturbation in real space, which generalises the standard local form by dropping the assumption that f_NL and g_NL are constants.
Erscheinungsjahr
2010
Zeitschriftentitel
JCAP
Band
2010
Ausgabe
10
Seite(n)
004
ISSN
1475-7516
eISSN
1475-7516
Page URI
https://pub.uni-bielefeld.de/record/1901164

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Byrnes C, Gerstenlauer M, Nurmi S, Tasinoato G, Wands D. Scale-dependent non-Gaussianity probes inflationary physics. JCAP. 2010;2010(10):004.
Byrnes, C., Gerstenlauer, M., Nurmi, S., Tasinoato, G., & Wands, D. (2010). Scale-dependent non-Gaussianity probes inflationary physics. JCAP, 2010(10), 004. https://doi.org/10.1088/1475-7516/2010/10/004
Byrnes, Christian, Gerstenlauer, M., Nurmi, S., Tasinoato, G., and Wands, D. 2010. “Scale-dependent non-Gaussianity probes inflationary physics”. JCAP 2010 (10): 004.
Byrnes, C., Gerstenlauer, M., Nurmi, S., Tasinoato, G., and Wands, D. (2010). Scale-dependent non-Gaussianity probes inflationary physics. JCAP 2010, 004.
Byrnes, C., et al., 2010. Scale-dependent non-Gaussianity probes inflationary physics. JCAP, 2010(10), p 004.
C. Byrnes, et al., “Scale-dependent non-Gaussianity probes inflationary physics”, JCAP, vol. 2010, 2010, pp. 004.
Byrnes, C., Gerstenlauer, M., Nurmi, S., Tasinoato, G., Wands, D.: Scale-dependent non-Gaussianity probes inflationary physics. JCAP. 2010, 004 (2010).
Byrnes, Christian, Gerstenlauer, M., Nurmi, S., Tasinoato, G., and Wands, D. “Scale-dependent non-Gaussianity probes inflationary physics”. JCAP 2010.10 (2010): 004.
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arXiv: 1007.4277

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