The Hubble tension has now grown to a level of significance which can no longer be
ignored and calls for a solution which, despite a huge number of attempts, has so far eluded …

We perform a comprehensive study of Milky Way (MW) satellite galaxies to constrain the
fundamental properties of dark matter (DM). This analysis fully incorporates inhomogeneities …

Measurements of the Hubble constant and, more generally, measurements of the expansion
rate and distances over the interval 0< z< 1 appear to be inconsistent with the predictions of …

Self-interacting dark matter (SIDM) arises generically in scenarios for physics beyond the
Standard Model that have dark sectors with light mediators or strong dynamics. The self …

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 …

Alternatives to the cold, collisionless dark matter (DM) paradigm in which DM behaves as a
collisional fluid generically suppress small-scale structure. Herein we use the observed …

This Voyage 2050 paper highlights the unique science opportunities using spectral
distortions of the cosmic microwave background (CMB). CMB spectral distortions probe …

We perform an improved cosmic microwave background (CMB) analysis to search for dark
matter–proton scattering with a momentum-transfer cross section of the form σ 0 vn for n=-2 …

While astrophysical and cosmological probes provide a remarkably precise and consistent
picture of the quantity and general properties of dark matter, its fundamental nature remains …