One-loop correction to the power spectrum in generic single-field inflation
is calculated extracting the most important operator, which also generates
primordial non-Gaussianity, using soft effective field theory. Due to the
enhancement inversely proportional to the observed red-tilt of the spectral
index of curvature perturbation, the correction turns out to be much larger
than previously anticipated. As a result, the primordial non-Gaussianity must
be much smaller than the current observational bound in order to warrant the
validity of cosmological perturbation theory.
%0 Generic
%1 kristiano2021primordial
%A Kristiano, J.
%A Yokoyama, Jun'ichi
%D 2021
%K tifr
%T Why Primordial Non-Gaussianity is Very Small?
%U http://arxiv.org/abs/2104.01953
%X One-loop correction to the power spectrum in generic single-field inflation
is calculated extracting the most important operator, which also generates
primordial non-Gaussianity, using soft effective field theory. Due to the
enhancement inversely proportional to the observed red-tilt of the spectral
index of curvature perturbation, the correction turns out to be much larger
than previously anticipated. As a result, the primordial non-Gaussianity must
be much smaller than the current observational bound in order to warrant the
validity of cosmological perturbation theory.
@misc{kristiano2021primordial,
abstract = {One-loop correction to the power spectrum in generic single-field inflation
is calculated extracting the most important operator, which also generates
primordial non-Gaussianity, using soft effective field theory. Due to the
enhancement inversely proportional to the observed red-tilt of the spectral
index of curvature perturbation, the correction turns out to be much larger
than previously anticipated. As a result, the primordial non-Gaussianity must
be much smaller than the current observational bound in order to warrant the
validity of cosmological perturbation theory.},
added-at = {2021-04-06T07:36:11.000+0200},
author = {Kristiano, J. and Yokoyama, Jun'ichi},
biburl = {https://www.bibsonomy.org/bibtex/243ee22d00c3924b915476e54ea2915f2/citekhatri},
description = {Why Primordial Non-Gaussianity is Very Small?},
interhash = {a0c4fee435fc1240d31392de2f576935},
intrahash = {43ee22d00c3924b915476e54ea2915f2},
keywords = {tifr},
note = {cite arxiv:2104.01953},
timestamp = {2021-04-06T07:36:11.000+0200},
title = {Why Primordial Non-Gaussianity is Very Small?},
url = {http://arxiv.org/abs/2104.01953},
year = 2021
}