All cosmological observations to date are consistent with adiabatic, Gaussian and nearly
scale invariant initial conditions. These findings provide strong evidence for a particular …

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 …

We identify a characteristic pattern in the scalar-induced stochastic gravitational wave
background from particle production during inflation. If particle production is sufficiently …

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

The inflationary origin of primordial black holes (PBHs) relies on a large enhancement of the
power spectrum Δ ζ of the curvature fluctuation ζ at wavelengths much shorter than those of …

The stochastic gravitational wave background (SGWB) offers a new opportunity to observe
signals of primordial features from inflationary models. We study their detectability with future …

A bstract Speed matters. How the masses and spins of new particles active during inflation
can be read off from the statistical properties of primordial density fluctuations is well …

This book lays out the scientific goals to be addressed by the next-generation ground-based
cosmic microwave background experiment, CMB-S4, envisioned to consist of dedicated …

We propose a new model-independent mechanism for producing primordial black holes
from a period of multi-field inflation. This requires an enhancement of primordial fluctuations …

Although cosmic microwave background and large scale structure probe the largest scales
of our Universe with ever-increasing precision, our knowledge about the smaller scales is …