Speaker
Description
We report R&D progress, as well as the first axion-like particle search results with BREAD - a novel dish antenna for broadband ~$\mu$eV-eV wave-dark matter detection, which allows to utilize state-of-the-art high-field solenoidal magnets. Axions are converted non-resonantly to photons on a cylindrical metallic wall parallel to an external magnetic field. These photons are then focused using a novel reflector geometry onto a state-of-the-art high-sensitive photon detector. We recently demonstrated [PRL 128 (2022) 131801] that this concept using a conversion area in a solenoidal magnet has the potential to discover QCD axions spanning multiple decades in mass range. In this talk we present progress on the first BREAD pilot experiment in the range of 10GHz in a 4T magnetic field, called GigaBREAD. While other dish antenna experiments have constrained dark photons, this is likely the first dish antenna apparatus constraining axion-like dark matter. We also discuss upscaling to larger, cryogenic and magnetized versions and advanced detectors.
