Ultralight axion-like particles are well-motivated dark matter candidates which can feature topological defects. If Earth encounters such structures, a global pattern of transient signals would be detectable with terrestrial experiments. Here, we report the analysis of three months of data from the Global Network of Optical Magnetometers for Exotic physics searches (GNOME). The data collected...
The axion is one of the most compelling dark matter (DM) candidates and a solution to the strong charge-parity problem. DMRadio-50L is a resonant lumped-element detector with a toroidal magnet searching for axions in the range 5 kHz - 5 MHz (20 peV - 20 neV) with a target sensitivity to axion-photon-photon coupling $5 \times 10^{-15}$ GeV$^{-1}$. DMRadio-50L also acts as an innovation platform...
Lighter than expected QCD axions can get destabilized in sufficiently dense and large objects such as white dwarfs and neutron stars. Once the axion is sourced the mass of nucleons within the star is reduced, leading to a new ground state of nuclear matter. I will show that white dwarfs in this absolutely stable phase would look very different from what is observed, allowing to set novel and...
The Cosmic axion Background (CaB), a relativistic background of axions that is not dark matter, could be produced in the late Universe from the decay of another dark matter candidate.
In this talk, we show the first result of the direct search for CaB performed with the axion haloscope, the Axion Dark Matter eXperiment.
Conventional haloscope analyses search for a signal with a narrow...
