Direct Search for Dark Matter Axions Excluding ALP Cogenesis in the 63-67 micro-eV Range, with The ORGAN Experiment

Understand

The standard model axion seesaw Higgs portal inflation (SMASH) model is a well motivated, self-contained description of particle physics over a range of energy scales that predicts axion dark matter particles to exist within the mass range of $50-200\,\mu$eV.

• To scan these masses an axion haloscope under a strong constant magnetic field must operate between 12 to 48 GHz.
• The ORGAN experiment (situated in Perth, Australia) is a microwave cavity axion haloscope that aims to search the majority of the mass range predicted by the SMASH model.
• Here we present results of Phase 1a, the first experiment to scan and search for axions in the microwave Ku Band.