Effective field theory of weakly coupled inflationary models

R Gwyn, GA Palma, M Sakellariadou… - Journal of Cosmology …, 2013 - iopscience.iop.org
Abstract The application of Effective Field Theory (EFT) methods to inflation has taken a
central role in our current understanding of the very early universe. The EFT perspective has …

Strongly coupled perturbations in two-field inflationary models

S Cremonini, Z Lalak, K Turzyński - Journal of Cosmology and …, 2011 - iopscience.iop.org
We study models of inflation with two scalar fields and non-canonical kinetic terms, focusing
on the case in which the curvature and isocurvature perturbations are strongly coupled to …

Decoupling survives inflation: a critical look at effective field theory violations during inflation

A Avgoustidis, S Cremonini, AC Davis… - … of Cosmology and …, 2012 - iopscience.iop.org
We investigate the validity of effective field theory methods and the decoupling of heavy
fields during inflation. Considering models of inflation in which the inflaton is coupled to a …

Dissipative effects in the effective field theory of inflation

DL Nacir, RA Porto, L Senatore… - Journal of High Energy …, 2012 - Springer
A bstract We generalize the effective field theory of single clock inflation to include
dissipative effects. Working in unitary gauge we couple a set of composite …

Effective theories of single field inflation when heavy fields matter

A Achucarro, JO Gong, S Hardeman, GA Palma… - Journal of High Energy …, 2012 - Springer
We compute the low energy effective field theory (EFT) expansion for singlefield inflationary
models that descend from a parent theory containing multiple other scalar fields. By …

Spectral running and non-Gaussianity from slow-roll inflation in generalized two-field models

KY Choi, LMH Hall, C van de Bruck - Journal of Cosmology and …, 2007 - iopscience.iop.org
Theories beyond the standard model such as string theory motivate low energy effective
field theories with several scalar fields which are not only coupled through a potential but …

Model independent signatures of new physics in the inflationary power spectrum

MG Jackson, K Schalm - Physical review letters, 2012 - APS
We compute the universal generic corrections to the inflationary power spectrum due to
unknown high-energy physics. We arrive at this result via a careful integrating out of massive …

Perturbative unitarity of inflationary models with features

D Cannone, N Bartolo, S Matarrese - Physical Review D, 2014 - APS
We consider the perturbative consistency of inflationary models with features with effective
field theory methods. By estimating the size of one-loop contributions to the three-point …

Influence of heavy modes on perturbations in multiple field inflation

X Gao, D Langlois, S Mizuno - Journal of Cosmology and …, 2012 - iopscience.iop.org
We investigate linear cosmological perturbations in multiple field inflationary models where
some of the directions are light while others are heavy (with respect to the Hubble …

Distinctive signatures of space-time diffeomorphism breaking in EFT of inflation

N Bartolo, D Cannone, A Ricciardone… - Journal of Cosmology …, 2016 - iopscience.iop.org
The effective field theory of inflation is a powerful tool for obtaining model independent
predictions common to large classes of inflationary models. It requires only information …