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A new experimental approach to probe QCD axion dark matter in the mass range above 40$\mu$eV
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abstract
The axion emerges in extensions of the Standard Model that explain the absence of CP violation in the strong interactions. Simultaneously, it can provide naturally the cold dark matter in our universe. Several searches for axions and axion-like particles (ALPs) have constrained the corresponding parameter space over the last decades but no unambiguous hints of their existence have been found. The axion mass range below 1 meV remains highly attractive and a well motivated region for dark matter axions. In this White Paper we present a description of a new experiment based on the concept of a dielectric haloscope for the direct search of dark matter axions in the mass range of 40 to 400 $\mu$eV. This MAgnetized Disk and Mirror Axion eXperiment (MADMAX) will consist of several parallel dielectric disks, which are placed in a strong magnetic field and with adjustable separations. This setting is expected to allow for an observable emission of axion induced electromagnetic waves at a frequency between 10 to 100 GHz corresponding to the axion mass.
Forward citations
Cited by 4 Pith papers
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Dark Matter Haloscope with a Disordered Dielectric Absorber
A disordered dielectric powder can act as a broadband dark-matter-to-photon conversion target, and the proposed DPHaSE experiment could probe QCD axions and dark photons in the 10 meV to 1 eV range.
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High-Frequency Gravitational Waves on BREAD
BREAD with single photon detectors could detect high-frequency gravitational waves at 0.05 to 200 THz, with projected strains as low as 1e-25 at 200 THz.
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String Theory and Grand Unification Suggest a Sub-Microelectronvolt QCD Axion
String-theoretic axions consistent with grand unification and proton decay are predicted to have masses in the 3e-11 to 1e-8 eV window, with at most 47 axions in the Kreuzer-Skarke ensemble.
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First searches for axion and dark photon dark matter with MADMAX
MADMAX prototypes produced the first dielectric-haloscope axion and dark photon dark matter searches near 77 to 84 micro-eV, beating earlier limits in narrow windows.
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