(CAST Collaboration) Altenmüller, K; Anastassopoulos, V; Arguedas-Cuendis, S; Aune, S; Baier, J; Barth, K; Bräuninger, H; Cantatore, G; Caspers, F; Castel, F; Çetin, SA; Christensen, F; Cogollos, C; Dafni, T; Davenport, M; Decker, TA; Desch, K; Díez-Ibáñez, D; Döbrich, B; Ferrer-Ribas, E; Fischer, H; Funk, W; Galán, J; García, JA; Gardikiotis, A; Giomataris, I; Golm, J; Hailey, CH; Hasinoff, MD; Hoffmann, DHH; Irastorza, IG; Jacoby, J; Jakobsen, AC; Jakovcic, K; Kaminski, J; Karuza, M; Kostoglou, S; Krieger, C; Lakic, B; Laurent, JM; Luzón, G; Malbrunot, C; Margalejo, C; Maroudas, M; Miceli, L; Mirallas, H; Navarro, P; Obis, L; Özbey, A; Özbozduman, K; Papaevangelou, T; Perez, O; Pivovaroff, MJ; Rosu, M; Ruiz-Chóliz, E; Ruz, J; Schmidt, S; Schumann, M; Semertzidis, YK; Solanki, SK; Stewart, L; Vafeiadis, T; Vogel, JK; Zioutas, K (2024) New Upper Limit on the Axion-Photon Coupling with an Extended CAST Run with a Xe-Based Micromegas Detector. Physical Review Letters, 133 (22). ISSN 0031-9007
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Abstract
Hypothetical axions provide a compelling explanation for dark matter and could be emitted from the hot solar interior. The CERN Axion Solar Telescope has been searching for solar axions via their back conversion to x-ray photons in a 9-T 10-m long magnet directed toward the Sun. We report on an extended run with the International Axion Observatory pathfinder detector, doubling the previous exposure time. The detector was operated with a xenon-based gas mixture for part of the new run, providing technical insights for future configurations. No counts were detected in the 95% signal-encircling region during the new run, while 0.75 were expected. The new data improve the axion-photon coupling limit to 5.8 x 10(-11) GeV-1 at 95% CL (for m(a) less than or similar to 0.02 eV), the most restrictive experimental limit to date.
| Item Type: | Article | ||||||||
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| Uncontrolled Keywords: | axions; dark matter; solar axions | ||||||||
| Subjects: | NATURAL SCIENCES > Physics NATURAL SCIENCES > Physics > Physics of Elementary Particles and Fields |
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| Divisions: | Division of Experimental Physics | ||||||||
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| Depositing User: | Ema Buhin Šaler | ||||||||
| Date Deposited: | 08 Apr 2026 06:58 | ||||||||
| URI: | http://fulir.irb.hr/id/eprint/11601 | ||||||||
| DOI: | 10.1103/PhysRevLett.133.221005 |
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