Particle physics today faces the challenge of explaining the mystery of dark matter, the origin
of matter over anti-matter in the Universe, the origin of the neutrino masses, the apparent …

We improve the current upper bound on the axion-photon coupling derived from stellar
evolution using the R 2 parameter, the ratio of stellar populations on the Asymptotic Giant …

Black hole superradiance is a powerful probe of light, weakly coupled hidden sector
particles. Many candidate particles, such as axions, generically have self-interactions that …

The main mechanism responsible for Axion-Like-Particle (ALP) production in the early
universe is the so-called misalignment mechanism. Three regimes have been investigated …

We propose a new broadband search strategy for ultralight axion dark matter that interacts
with electromagnetism. An oscillating axion field induces transitions between two …

A bstract We propose an approach to search for axion dark matter with a specially designed
superconducting radio frequency cavity, targeting axions with masses ma≲ 10− 6 eV. Our …

The QCD axion has been postulated to exist because it solves the strong-CP problem.
Furthermore, if it exists axions should be created in the early Universe and could account for …

This white paper collects some open questions in several different aspects of axion theories.
The questions are related to quantization of axion couplings, axion-magnetic monopole …

Möbius-ring resonators stem from a well-studied and fascinating geometrical structure which
features a one-sided topology, the Möbius strip, and have been shown to exhibit fermion …

We systematically calculate the axion-photon coupling for nonminimal Dine-Fischler-
Srednicki-Zhitnitsky (DFSZ) models. Thereby, we can classify every calculated model and …