Abstract LiteBIRD, the Lite (Light) satellite for the study of B-mode polarization and Inflation
from cosmic background Radiation Detection, is a space mission for primordial cosmology …

Axions and other very light axion-like particles appear in many extensions of the Standard
Model, and are leading candidates to compose part or all of the missing matter of the …

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 current cosmological model requires new physics beyond the standard model of
elementary particles and fields, such as dark matter and dark energy. Their nature is …

Axions comprise a broad class of particles that can play a major role in explaining the
unknown aspects of cosmology. They are also well-motivated within high energy physics …

We search for ultra-light axions as dark matter (DM) and dark energy particle candidates, for
axion masses 10-32 eV≤ ma≤ 10-24 eV, by a joint analysis of cosmic microwave …

We perform an extensive analysis of the statistics of axion masses and interactions in
compactifications of type IIB string theory, and we show that black hole superradiance …

Ultralight axions (ULAs) with masses in the range 1 0-33 eV≤ ma≤ 1 0-20 eV are motivated
by string theory and might contribute to either the dark-matter or dark-energy densities of the …

String theory suggests the simultaneous presence of many ultralight axions, possibly
populating each decade of mass down to the Hubble scale 10-33 eV. Conversely the …

We point out two ways to search for low-mass axion dark matter using cosmic microwave
background (CMB) polarization measurements. These appear, in particular, to be some of …