We perform the analysis of the trispectrum of curvature perturbations generated by the interactions characterizing a general theory of single-field inflation obtained by effective field theory methods. We find that curvature-generated interaction terms, which can in general give an important contribution to the amplitude of the four-point function, show some new distinctive features in the form of their trispectrum shape-function. These interesting interactions are invariant under some recently proposed symmetries of the general theory and, as shown explicitly, do allow for a large value of the trispectrum. © 2010 IOP Publishing Ltd and SISSA.

Bartolo, N., Fasiello, M., Matarrese, S., Riotto, A. (2010). Large non-gaussianities in the effective field theory approach to single-field inflation: The trispectrum. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2010(9), 035-035 [10.1088/1475-7516/2010/09/035].

Large non-gaussianities in the effective field theory approach to single-field inflation: The trispectrum

FASIELLO, MATTEO RAFFAELE;
2010

Abstract

We perform the analysis of the trispectrum of curvature perturbations generated by the interactions characterizing a general theory of single-field inflation obtained by effective field theory methods. We find that curvature-generated interaction terms, which can in general give an important contribution to the amplitude of the four-point function, show some new distinctive features in the form of their trispectrum shape-function. These interesting interactions are invariant under some recently proposed symmetries of the general theory and, as shown explicitly, do allow for a large value of the trispectrum. © 2010 IOP Publishing Ltd and SISSA.
Articolo in rivista - Articolo scientifico
Cosmological perturbation theory; Inflation; Non-gaussianity;
English
2010
2010
9
035
035
035
none
Bartolo, N., Fasiello, M., Matarrese, S., Riotto, A. (2010). Large non-gaussianities in the effective field theory approach to single-field inflation: The trispectrum. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2010(9), 035-035 [10.1088/1475-7516/2010/09/035].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/48145
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