WISP Dark Matter eXperiment and Prospects for Broadband Dark Matter Searches in the $1\,\mu$eV--$10\,$meV Mass Range

TL;DR

The paper discusses the WISP Dark Matter eXperiment (WISPDMX) and new broadband search methods for detecting weakly interacting slim particles (WISPs) in the mass range of 1 micro-eV to 10 milli-eV, highlighting initial results and future potential.

Contribution

It introduces the WISPDMX experiment and explores innovative broadband search techniques for WISPs, expanding the search parameter space for dark matter candidates.

Findings

Initial results from WISPDMX are presented.

Broadband radiometry methods show promise for WISP detection.

Future prospects include enhanced sensitivity and wider mass range coverage.

Abstract

Light cold dark matter consisting of weakly interacting slim (or sub-eV) particles (WISPs) has been in the focus of a large number of studies made over the past two decades. The QCD axion and axion-like particles with masses in the $0.1\,\mu$eV--$100\,$meV are strong candidates for the dark matter particle, together with hidden photons with masses below $\lesssim 100\,$meV. This motivates several new initiatives in the field, including the WISP Dark Matter eXperiment (WISPDMX) and novel conceptual approaches for broad-band WISP searches using radiometry measurements in large volume chambers. First results and future prospects for these experiments are discussed in this contribution.