We review models which generate a large non‐Gaussianity of the local form. We first briefly
consider three models which generate the non‐Gaussianity either at or after the end of …

CMB-S4 Science Case, Reference Design, and Project Plan Page 1 CMB-S4 Science Case,
Reference Design, and Project Plan CMB-S4 Collaboration July 9, 2019 arXiv:1907.04473v1 …

The Simons Observatory (SO) is a new cosmic microwave background experiment being
built on Cerro Toco in Chile, due to begin observations in the early 2020s. We describe the …

Cosmic inflation provides a window to the highest energy densities accessible in nature, far
beyond those achievable in any realistic terrestrial experiment. Theoretical insights into the …

The past two decades have seen transformative advances in cosmology and string theory.
Observations of the cosmic microwave background have revealed strong evidence for …

In the last few decades, advances in observational cosmology have given us a standard
model of cosmology. We know the content of the universe to within a few percent. With more …

We examine the effective theory of single-field inflation in the limit where the scalar
perturbations propagate with a small speed of sound. In this case the non-linearly realized …

We study the scale dependence of halo bias in generic (nonlocal) primordial non-Gaussian
(PNG) initial conditions of the type motivated by inflation, parametrized by an arbitrary …

A measurement of primordial non-Gaussianity will be of paramount importance to
distinguish between different models of inflation. Cosmic microwave background (CMB) …

Realistic models of high-energy physics include multiple scalar fields. Renormalization
requires that the fields have nonminimal couplings to the spacetime Ricci curvature scalar …