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 …

Ultralight axions and dark photons are well-motivated dark matter candidates. Inside the
plasma, once the mass of ultralight dark matter candidates equals the plasma frequency …

A search for dark matter axions with masses> 10 μ eV/c 2 has been performed using the
HAYSTAC experiment's squeezed state receiver to achieve subquantum limited noise. This …

We report an extensive high-sensitivity search for axion dark matter above 1 GHz at the
Center for Axion and Precision Physics Research (CAPP). The cavity resonant search …

In the scenario in which QCD axion dark matter is produced after inflation, the Universe is
populated by large inhomogeneities on very small scales. Eventually, these fluctuations will …

High-frequency gravitational waves (HFGWs) are predicted in various exotic scenarios
involving both cosmological and astrophysical sources. These elusive signals have recently …

Axions are highly motivated hypothetical particles beyond the standard model that can be
dark matter candidates and address the strong CP problem. Here we search for axion …

We report the results of Phase 1b of the ORGAN experiment, a microwave cavity haloscope
searching for dark matter axions in the 107.42–111.93 μ eV mass range. The search …

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 …

Dark matter makes up 85% of the matter in the Universe and 27% of its energy density, but
we do not know what comprises dark matter. It is possible that dark matter is composed of …