A confirmed dark photon dark matter detection at 19.5 micro-electronvolts would, via the inflationary production formula, predict tensor modes just below current limits and within reach of next-generation experiments, linking dark matter to inflation.
Taiwan Axion Search Experiment with Haloscope: CD102 Analysis Details
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This paper presents the analysis of the data acquired during the first physics run of the Taiwan Axion Search Experiment with Haloscope (TASEH), a search for axions using a microwave cavity at frequencies between 4.70750 and 4.79815 GHz. The data were collected from October 13, 2021 to November 15, 2021, and are referred to as the CD102 data. The analysis of the TASEH CD102 data excludes models with the axion-two-photon coupling $|g_{a\gamma\gamma}| \gtrsim 8.2\times 10^{-14}$ GeV$^{-1}$, a factor of eleven above the benchmark KSVZ model for the mass range 19.4687 < ma < 19.8436 $\mu$eV.
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Out of the darkness: probing the inflationary era with dark photon dark matter
A confirmed dark photon dark matter detection at 19.5 micro-electronvolts would, via the inflationary production formula, predict tensor modes just below current limits and within reach of next-generation experiments, linking dark matter to inflation.