First results from BRASS-p broadband searches for hidden photon dark matter

Fayez Bajjali, Sven Dornbusch, Marko Ekmedžić, Dieter Horns, Christoph Kasemann, Andrei Lobanov, Artak Mkrtchyan, Le Hoang Nguyen, Martin Tluczykont, Gino Tuccari, Johannes Ulrichs, Gundolf Wieching, Anton Zensus
High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), Instrumentation and Detectors (physics.ins-det)
2023-06-08 16:00:00
We discuss first results from hidden photon dark matter searches made with a prototype of the Broadband Radiometric Axion/ALPs Search Setup (BRASS-p) in the range of particle mass of 49.63-74.44 $\mu$eV (frequency range of 12-18 GHz). The conceptual design of BRASS and a detailed description of its present prototype, BRASS-p, are given, with a view of the potential application of such setups to hidden photon, axion, and axion-like particle (ALP) dark matter searches using heterodyne detectors in the range of particle mass from 40$\mu$eV to 4000$\mu$eV (10 GHz to 1 THz). Pioneering measurements made with BRASS-p achieve the record sensitivity of (0.3--1.0)$\times$$10^{-13}$ to the kinetic mixing between the normal and hidden photons, assuming the dark matter is made entirely of unpolarized hidden photons. Based on these results, a discussion of further prospects for dark matter searches using the BRASS-p apparatus is presented.
PDF: First results from BRASS-p broadband searches for hidden photon dark matter.pdf
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