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| Format: | Preprint |
| Veröffentlicht: |
2025
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| Online-Zugang: | https://arxiv.org/abs/2510.15361 |
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| _version_ | 1866912831118508032 |
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| author | Quiskamp, Aaron P. Flower, Graeme R. Goryachev, Maxim Tobar, Michael E. McAllister, Ben T. |
| author_facet | Quiskamp, Aaron P. Flower, Graeme R. Goryachev, Maxim Tobar, Michael E. McAllister, Ben T. |
| contents | 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 $\sim 4.7σ$ at $f_X \simeq$ 4.71 GHz, corresponding to $m_X \simeq 19.5~μ$eV and kinetic mixing $ε\sim 6.5\times 10^{-15}$. Motivated by this report, we performed a dedicated, narrowband follow-up experiment to confirm or refute the signal with a cryogenic microwave cavity operated \emph{without} 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 $T_{int}\sim 13$ days, we find no excess consistent with a dark photon signal as reported, and set $95\%$ C.L. exclusion on $ε$ in a narrow mass range around $\sim 19.5~μ$eV, excluding a signal of the strength and frequency reported to 99.92$\%$ confidence. We discuss the experiment and present the exclusion limits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_15361 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Follow-up Search for a Tentative Dark Photon Signal Near 19.5 $μ$eV using ORGAN-Q infrastructure Quiskamp, Aaron P. Flower, Graeme R. Goryachev, Maxim Tobar, Michael E. McAllister, Ben T. High Energy Physics - Experiment 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 $\sim 4.7σ$ at $f_X \simeq$ 4.71 GHz, corresponding to $m_X \simeq 19.5~μ$eV and kinetic mixing $ε\sim 6.5\times 10^{-15}$. Motivated by this report, we performed a dedicated, narrowband follow-up experiment to confirm or refute the signal with a cryogenic microwave cavity operated \emph{without} 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 $T_{int}\sim 13$ days, we find no excess consistent with a dark photon signal as reported, and set $95\%$ C.L. exclusion on $ε$ in a narrow mass range around $\sim 19.5~μ$eV, excluding a signal of the strength and frequency reported to 99.92$\%$ confidence. We discuss the experiment and present the exclusion limits. |
| title | Follow-up Search for a Tentative Dark Photon Signal Near 19.5 $μ$eV using ORGAN-Q infrastructure |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2510.15361 |