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 …

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 …

Axions are well-motivated dark matter candidates with simple cosmological production
mechanisms. They were originally introduced to solve the strong CP problem, but also arise …

This paper describes the physics case for a new fixed target facility at CERN SPS. The SHiP
(search for hidden particles) experiment is intended to hunt for new physics in the largely …

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 …

Very weakly interacting slim particles (WISPs), such as axion-like particles (ALPs) or hidden
photons (HPs), may be non-thermally produced via the misalignment mechanism in the …

We propose an experiment to search for QCD axion and axionlike-particle dark matter.
Nuclei that are interacting with the background axion dark matter acquire time-varying CP …

Abstract If the Peccei-Quinn symmetry associated to an axion has ever been restored after
inflation, axion strings inevitably produce a contribution to the stochastic gravitational wave …

We revise the bound from the supernova SN1987A on the coupling of ultralight axion-like
particles (ALPs) to photons. In a core-collapse supernova, ALPs would be emitted via the …