New CAST limit on the axion-photon interaction

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Title
New CAST limit on the axion-photon interaction
Author(s)
V. Anastassopoulos; S. Aune; K. Barth; A. Belov; H. Brauninger; G. Cantatore; J. M. Carmona; J.F. Castel; S.A. Cetin; F. Christensen; J. I. Collar; T. Dafni; M. Davenport; T. A. Decker; A. Dermenev; K. Desch; C. Eleftheriadis; G. Fanourakis; E. Ferrer-Ribas; H. Fischer; J.A. Garcia; A. Gardikiotis; J.G. Garza; E.N. Gazis; T. Geralis; I. Giomataris; S. Gninenko; C.J. Hailey; M.D. Hasinoff; D.H.H. Hoffmann; F.J. Iguaz; I.G. Irastorza; A. Jakobsen; J. Jacoby; K. Jakovcic; J. Kaminski; M. Karuza; N. Kralj; M. Krcmar; S. Kostoglou; Ch. Krieger; B. Lakic; J.M. Laurent; A. Liolios; A. Ljubicic; G. Luzon; M. Maroudas; Lino Miceli; S. Neff; I. Ortega; T. Papaevangelou; K. Paraschou; M.J. Pivovaroff; G. Raffelt; M. Rosu; J. Ruz; E. Ruiz Choliz; I. Savvidis; S. Schmidt; Yannis Semertzidis; S.K. Solanki; L. Stewart; T. Vafeiadis; J.K. Vogel; S.C. Yildiz; K. Zioutas
Publication Date
2017-06
Journal
Nature Physics, v.13, no.6, pp.584 - 590
Publisher
NATURE PUBLISHING GROUP
Abstract
Hypothetical low-mass particles, such as axions, provide a compelling explanation for the dark matter in the universe. Such particles are expected to emerge abundantly from the hot interior of stars. To test this prediction, the CERN Axion Solar Telescope (CAST) uses a 9 T refurbished Large Hadron Collider test magnet directed towards the Sun. In the strong magnetic field, solar axions can be converted to X-ray photons which can be recorded by X-ray detectors. In the 2013–2015 run, thanks to low-background detectors and a new X-ray telescope, the signal-to-noise ratio was increased by about a factor of three. Here, we report the best limit on the axion–photon coupling strength (0.66 × 10−10 GeV−1 at 95% confidence level) set by CAST, which now reaches similar levels to the most restrictive astrophysical bounds.
URI
https://pr.ibs.re.kr/handle/8788114/3621
ISSN
1745-2473
Appears in Collections:
Center for Axion and Precision Physics Research(액시온 및 극한상호작용 연구단) > Journal Papers (저널논문)
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