Scalar-Magnetometer Search for Ultralight Dark Photon Dark Matter with a Single-Site, Two-Sensor Array: A 6-Channel DTFT Likelihood Analysis with Scalar Optically Pumped Magnetometers
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arXiv
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2025
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| author | Zhao, Peisen Behrens, Ole Benning, Maja Fierlinger, Peter Han, Xuefen Huber, Maximilian Kuchler, Florian Stadnik, Yevgeny V. Wunderl, Philipp |
| author_facet | Zhao, Peisen Behrens, Ole Benning, Maja Fierlinger, Peter Han, Xuefen Huber, Maximilian Kuchler, Florian Stadnik, Yevgeny V. Wunderl, Philipp |
| contents | We report on a laboratory search for ultralight dark photon dark matter using a single-site, two-sensor scalar magnetometer array. The experiment employs two scalar optically pumped magnetometers (OPMs) operated in a differential configuration to suppress common-mode noise and enhance sensitivity to spatially coherent dark photon fields. We analyze 10.5 hours of continuous data with a six-channel complex data vector evaluated at the three physical frequencies of the expected dark photon signal triplet. Assuming Gaussian noise, we develop a likelihood framework to set robust, frequency-resolved upper limits on the kinetic-mixing parameter $\varepsilon$, which governs the coupling between Standard Model photons and dark photons. Within the mass range $4\times10^{-15}\,\mathrm{eV} \leq m_{A'} \leq 3\times10^{-14}\,\mathrm{eV}$, we obtain the most stringent direct laboratory limits to date on $\varepsilon$, complementing existing astrophysical bounds including those inferred from observations of the Leo-T dwarf galaxy. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2511_08064 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Scalar-Magnetometer Search for Ultralight Dark Photon Dark Matter with a Single-Site, Two-Sensor Array: A 6-Channel DTFT Likelihood Analysis with Scalar Optically Pumped Magnetometers Zhao, Peisen Behrens, Ole Benning, Maja Fierlinger, Peter Han, Xuefen Huber, Maximilian Kuchler, Florian Stadnik, Yevgeny V. Wunderl, Philipp High Energy Physics - Phenomenology We report on a laboratory search for ultralight dark photon dark matter using a single-site, two-sensor scalar magnetometer array. The experiment employs two scalar optically pumped magnetometers (OPMs) operated in a differential configuration to suppress common-mode noise and enhance sensitivity to spatially coherent dark photon fields. We analyze 10.5 hours of continuous data with a six-channel complex data vector evaluated at the three physical frequencies of the expected dark photon signal triplet. Assuming Gaussian noise, we develop a likelihood framework to set robust, frequency-resolved upper limits on the kinetic-mixing parameter $\varepsilon$, which governs the coupling between Standard Model photons and dark photons. Within the mass range $4\times10^{-15}\,\mathrm{eV} \leq m_{A'} \leq 3\times10^{-14}\,\mathrm{eV}$, we obtain the most stringent direct laboratory limits to date on $\varepsilon$, complementing existing astrophysical bounds including those inferred from observations of the Leo-T dwarf galaxy. |
| title | Scalar-Magnetometer Search for Ultralight Dark Photon Dark Matter with a Single-Site, Two-Sensor Array: A 6-Channel DTFT Likelihood Analysis with Scalar Optically Pumped Magnetometers |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2511.08064 |