New upper limit on the axion-photon coupling with an extended CAST run with a Xe-Based micromegas detector

Altenmüller, K. ; Anastassopoulos, V. ; Arguedas-Cuendis, S. ; Aune, S. ; Baier, J. ; Barth, K. ; Bräuninger, H. ; Cantatore, G. ; Caspers, F. ; Castel, J.F. (Universidad de Zaragoza) ; Çetin, S.A. ; Christensen, F. ; Cogollos, C. ; Dafni, T. ; Davenport, M. ; Decker, T.A. ; Desch, K. ; Díez-Ibáñez, D. ; Döbrich, B. ; Ferrer-Ribas, E. ; Fischer, H. ; Funk, W. ; Galán, J. ; García, J.A. (Universidad de Zaragoza) ; Gardikiotis, A. ; Giomataris, I. ; Golm, J. ; Hailey, C.H. ; Hasinoff, M.D. ; Hoffmann, D.H.H. ; Irastorza, I.G. (Universidad de Zaragoza) ; Jacoby, J. ; Jakobsen, A.C. ; Jakovcic, K. ; Kaminski, J. ; Karuza, M. ; Kostoglou, S. ; Krieger, C. ; Lakic, B. ; Laurent, J.M. ; Luzón, G. (Universidad de Zaragoza) ; Malbrunot, C. ; Margalejo, C. (Universidad de Zaragoza) ; Maroudas, M. ; Miceli, L. ; Mirallas, H. (Universidad de Zaragoza) ; Navarro, P. ; Obis, L. (Universidad de Zaragoza) ; Özbey, A. ; Özbozduman, K. ; Papaevangelou, T. ; Pérez, O. (Universidad de Zaragoza) ; Pivovaroff, M.J. ; Rosu, M. ; Ruiz-Chóliz, E. ; Ruz, J. (Universidad de Zaragoza) ; Schmidt, S. ; Schumann, M. ; Semertzidis, Y.K. ; Solanki, S.K. ; Stewart, L. ; Vafeiadis, T. ; Vogel, J.K. ; Zioutas, K. ;

Resumen: 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 5.8×10−11  GeV−1 at 95% CL (for ma≲0.02  eV), the most restrictive experimental limit to date.

Idioma: Inglés

DOI: 10.1103/PhysRevLett.133.221005

Año: 2024

Publicado en: Physical Review Letters 133, 22 (2024), 221005 [8 pp.]
ISSN: 0031-9007

Financiación: info:eu-repo/grantAgreement/EC/H2020/788781/EU/Towards the detection of the axion with the International Axion Observatory/IAXOplus
Financiación: info:eu-repo/grantAgreement/EC/H2020/802836/EU/Axions and relatives across different mass scales/AxScale
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2019-108122GB-C31
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2022-137268NB-C51

Tipo y forma: Article (Published version)

Área (Departamento): Proy. investigación HCA (Dpto. Física Teórica)
Área (Departamento): Área Física Atóm.Molec.y Nucl. (Dpto. Física Teórica)