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Title: Mild Quasilocal Non-Gaussianity as a Signature of Modified Gravity During Inflation
Author: Bartolo, Nicola
Cannone, Dario
Jiménez, Raúl (Jiménez Tellado)
Matarrese, Sabino
Verde, Licia
Keywords: Cosmologia
Issue Date: 17-Oct-2014
Publisher: American Physical Society
Abstract: We show that modifications of Einstein gravity during inflation could leave potentially measurable imprints on cosmological observables in the form of non-Gaussian perturbations. This is due to the fact that these modifications appear in the form of an extra field that could have nontrivial interactions with the inflaton. We show it explicitly for the case R + α R 2 , where nearly scale-invariant non-Gaussianity at the level of f NL ≈ − ( 1   to   30 ) can be obtained, in a quasilocal configuration.
Note: Reproducció del document publicat a:
It is part of: Physical Review Letters, 2014, vol. 113, num. 16, p. 161303
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))
Publicacions de projectes de recerca finançats per la UE

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