%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 }