153624 20251017144552.0 doi 10.1103/PhysRevLett.134.151004 sideral 143823 ART-2025-143823 eng Egge, J. First Search for Dark Photon Dark Matter with a madmax Prototype 2025 Access copy available to the general public Unrestricted We report the first result from a dark photon dark matter search in the mass range from 78.62 to 83.95  μeV/c2 with a dielectric haloscope prototype for (Magnetized Disc and Mirror Axion eXperiment). Putative dark photons would convert to detectable photons within a stack consisting of three sapphire disks and a mirror. The emitted power of this system is received by an antenna and successively digitized using a low-noise receiver. No significant signal attributable to dark photons has been observed above the expected background. Assuming unpolarized dark photon dark matter with a local density of ρχ=0.3  GeV cm3 we exclude a dark photon to photon mixing parameter χ>2.7×10−12 over the full mass range and χ>1.1×10−13 at a mass of 80.57  μeV/c2 with a 95% confidence level. This is the first physics result from a prototype and exceeds previous constraints on χ in this mass range by up to almost three orders of magnitude. info:eu-repo/grantAgreement/ES/DGA-FSE/E21-17R info:eu-repo/grantAgreement/ES/MICINN/PGC2022-126078NB-C21 info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Leppla-Weber, D. Knirck, S. Ary dos Santos Garcia, B. Bergermann, D. Caldwell, A. Dabhi, V. Diaconu, C. Diehl, J. Dvali, G. Ekmedžic, M. Gallo, F. Garutti, E. Heyminck, S. Hubaut, F. Ivanov, A. Jochum, J. Karst, P. Kramer, M. Kreikemeyer-Lorenzo, D. Krieger, C. Lee, C. Lindner, A. Maldonado, J.¿P.¿A. Majorovits, B. Martens, S. Martini, A. Miyazaki, A. Öz, E. Pralavorio, P. Raffelt, G. Ringwald, A. Redondo, J. Universidad de Zaragoza (orcid)0000-0002-1044-8197 Roset, S. Salama, N. Schaffran, J. Schmidt, A. Steffen, F. Strandhagen, C. Usherov, I. Wang, H. Wieching, G. Cancelo, G. Di Federico, M. Hoshino, G. Stefanazzi, L. 2004 405 Universidad de Zaragoza Dpto. Física Teórica Área Física Teórica 134, 15 (2025), 151004 [7 pp.] Phys. rev. lett. Physical Review Letters 0031-9007 2611138 http://zaguan.unizar.es/record/153624/files/texto_completo.pdf Versión publicada 2657868 http://zaguan.unizar.es/record/153624/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:153624 articulos driver 2025-10-17-14:12:13 ARTICLE