Follow-up search for a tentative dark photon signal near 19.5 μ eV using the ORGAN-Q infrastructure
Year: 2025
Type: article
Abstract: A recent independent dark photon (DP) focused reanalysis of existing data from the TASEH axion haloscope experiment reported a tentative DP dark matter signal with local significance ∼ 4.7 σ at a frequency f ≈ 4.71 GHz , corresponding to m X ≈ 19.5 μ eV and kinetic mixing ϵ ∼ 6.5 × 10 − 15 . Motivated by this report, we performed a dedicated, narrowband follow-up experiment to confirm or refute the signal with a cryogenic microwave cavity operated a magnetic field, leveraging the ORGAN-Q dilution refrigeration and receiver chain. Scanning a window centered on the reported frequency over a live time of T int ∼ 13 days , we find no excess consistent with a dark photon signal as reported, and set a 95% CL of ϵ ≤ 5.04 × 10 − 15 in a narrow mass range around ∼ 19.5 μ eV , excluding a signal of the strength and frequency reported to 99.92% confidence. We discuss the experiment and present the exclusion limits.
DOI: 10.1103/2ydp-2gz9
Authors: Aaron P. Quiskamp, Graeme R. Flower, Maxim Goryachev, Michael E. Tobar, Ben T. McAllister
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Funder: Australian Research Council
OpenAlex ID: W4417435745