Scale dependence of local f(NL)

Byrnes C, Nurmi S, Tasinato G, Wands D (2010)
JCAP 2010(02): 034.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor/in
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Abstract / Bemerkung
We consider possible scale-dependence of the non-linearity parameter f(NL) in local and quasi-local models of non-Gaussian primordial density perturbations. In the simplest model where the primordial perturbations are a quadratic local function of a single Gaussian field then f(NL) is scale-independent by construction. However scale-dependence can arise due to either a local function of more than one Gaussian field, or due to non-linear evolution of modes after horizon-exit during inflation. We show that the scale dependence of f(NL) is typically first order in slow-roll. For some models this may be observable with experiments such as Planck provided that f(NL) is close to the current observational bounds.
Stichworte
cosmological perturbation theory; inflation; non-gaussianity
Erscheinungsjahr
2010
Zeitschriftentitel
JCAP
Band
2010
Ausgabe
02
Seite(n)
034
ISSN
1475-7516
eISSN
1475-7516
Page URI
https://pub.uni-bielefeld.de/record/1585352

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Byrnes C, Nurmi S, Tasinato G, Wands D. Scale dependence of local f(NL). JCAP. 2010;2010(02):034.
Byrnes, C., Nurmi, S., Tasinato, G., & Wands, D. (2010). Scale dependence of local f(NL). JCAP, 2010(02), 034. doi:10.1088/1475-7516/2010/02/034
Byrnes, C., Nurmi, S., Tasinato, G., and Wands, D. (2010). Scale dependence of local f(NL). JCAP 2010, 034.
Byrnes, C., et al., 2010. Scale dependence of local f(NL). JCAP, 2010(02), p 034.
C. Byrnes, et al., “Scale dependence of local f(NL)”, JCAP, vol. 2010, 2010, pp. 034.
Byrnes, C., Nurmi, S., Tasinato, G., Wands, D.: Scale dependence of local f(NL). JCAP. 2010, 034 (2010).
Byrnes, Christian, Nurmi, Sami, Tasinato, Gianmassimo, and Wands, David. “Scale dependence of local f(NL)”. JCAP 2010.02 (2010): 034.

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arXiv: 0911.2780

Inspire: 836955

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