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 …

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 …

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 …

Our current understanding of the Universe is established through the pristine measurements
of structure in the cosmic microwave background (CMB) and the distribution and shapes of …

We present a systematic introduction to the diagrammatic method for practical calculations in
inflationary cosmology, based on Schwinger-Keldysh path integral formalism. We show in …

It is generally expected that heavy fields are present during inflation, which can leave their
imprint in late-time cosmological observables. The main signature of these fields is a small …

The inflationary universe can be viewed as a “cosmological collider” with an energy of the
Hubble scale, producing very massive particles and recording their characteristic signals in …

We study the effects of a massive field with a continuous spectrum (continuum isocurvaton)
on the inflationary bispectrum in the squeezed limit. As a concrete example, we extend the …

A bstract Massive fields can imprint unique oscillatory features on primordial correlation
functions or inflationary correlators, which is dubbed the cosmological collider signal. In this …

A bstract Cosmological colliders can preserve information from interactions at very high
energy scale, and imprint them on cosmological observables. Taking the squeezed limit of …