The simplest ΛCDM model provides a good fit to a large span of cosmological data but
harbors large areas of phenomenology and ignorance. With the improvement of the number …

A number of challenges to the standard Λ CDM model have been emerging during the past
few years as the accuracy of cosmological observations improves. In this review we discuss …

We review the landscape of QCD axion models. Theoretical constructions that extend the
window for the axion mass and couplings beyond conventional regions are highlighted and …

The strong discrepancy between local and early-time (inverse distance ladder) estimates of
the Hubble constant H 0 could be pointing towards new physics beyond the concordance Λ …

We perform a comprehensive cosmological study of the H 0 tension between the direct local
measurement and the model-dependent value inferred from the Cosmic Microwave …

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 …

New physics in the neutrino sector might be necessary to address anomalies between
different neutrino oscillation experiments. Intriguingly, it also offers a possible solution to the …

Using some of the latest cosmological data sets publicly available, we derive the strongest
bounds in the literature on the sum of the three active neutrino masses, M ν, within the …

We present a comprehensive review of keV-scale sterile neutrino Dark Matter, collecting
views and insights from all disciplines involved—cosmology, astrophysics, nuclear, and …

A review is given of the theory and phenomenology of neutrino electromagnetic interactions,
which provide powerful tools to probe the physics beyond the standard model. After a …