In the late 1970s, the axion was proposed as a solution to the strong CP problem, ie, the
puzzle why the strong interactions conserve parity P and the product CP of charge …

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 …

We introduce the Broadband Reflector Experiment for Axion Detection (BREAD) conceptual
design and science program. This haloscope plans to search for bosonic dark matter across …

During 2003--2015, the CERN Axion Solar Telescope (CAST) has searched for $
a\to\gamma $ conversion in the 9 T magnetic field of a refurbished LHC test magnet that can …

arXiv:1707.04591v1 [hep-ph] 14 Jul 2017 Page 1 US Cosmic Visions: New Ideas in Dark
Matter 2017 : Community Report Marco Battaglieri (SAC co-chair),1 Alberto Belloni (Coordinator),2 …

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 …

Four decades after its prediction, the axion remains the most compelling solution to the
strong-CP problem and a well-motivated dark matter candidate, inspiring a host of elegant …

We obtain a reliable cosmological bound on the axion mass ma by (1) deriving the
production rate directly from pion-pion scattering data, which overcomes the breakdown of …

The cosmological scenario where the Peccei-Quinn symmetry is broken after inflation is
investigated. In this scenario, topological defects such as strings and domain walls produce …

Hypothetical low-mass particles, such as axions, provide a compelling explanation for the
dark matter in the universe. Such particles are expected to emerge abundantly from the hot …