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arXiv · 2306.05934

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
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Abstract

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.

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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. 2023-06-09. First results from BRASS-p broadband searches for hidden photon dark matter. https://doi.org/10.1088/1475-7516%2F2023%2F08%2F077

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