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Constraints on Galactic Dark Photons from a DALI Prototype

Year: 2026
Type: preprint
Abstract: An analysis of 36 hours of data from a DALI haloscope reveals no statistically significant excess attributable to dark-photon dark matter. We therefore set new constraints in the 6.88691--6.91792 GHz band, reaching a dark-photon-to-photon kinetic mixing strength of $χ\lesssim 6.8\times10^{-14}$ at $28.54 \, μ\mathrm{eV}$. To our knowledge, this result established the strongest laboratory-based exclusion limit in this frequency range.
DOI: 10.48550/arxiv.2609.12775
Authors: De Miguel, Javier, Gardikiotis, Antonios, Hernández-Suárez, Elvio, Hoyland, Roger J., Joven, Enrique, Kryemadhi, Abaz, Lorenzo-Hernández, Haroldo, Maroudas, Marios, Otani, Chiko, Rubiño-Martín, J. Alberto, Semertzidis, Yannis K., Tobar, Michael E., Zioutas, Konstantin
Institutions: University of Patras, National Centre of Scientific Research "Demokritos", Instituto de Astrofísica de Canarias, Messiah University, Universität Hamburg, RIKEN Center for Advanced Photonics, Universidad de La Laguna, The University of Western Australia
Language: English
Open Access status: green
Funders: Ministerio de Ciencia, Innovación y Universidades, Deutsche Forschungsgemeinschaft, Instituto de Astrofísica de Canarias, RIKEN, European Regional Development Fund, Agencia Estatal de Investigación
Awards: G1089506725, G1105844351, G1175115578, G1767413778, G195395952, G2257393230, G2262748287, G294895050, G300979063, G3413881215, G3480869486, G3534678521, G410571670, G41332073, G425668148, G432818845, G451917667, G491712853, G5020660627, G5080475149, G5099673792, G5178665745, G523076202, G5539308778, G5635532810, G5697663898, G593054264, G5955501538, G5967599077, G6033112984, G7084143925, EXC 2121: Quantum Universe, G7395345766, G7549035430, G776579233, G7805626310, G7840098671, G7863371703, G7915813472, G8497050386, G8667377315, G8733234872, G966035586
OpenAlex ID: W7212943687
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