Improved search for solar chameleons with a GridPix detector at CAST

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Title
Improved search for solar chameleons with a GridPix detector at CAST
Author(s)
V. Anastassopoulos; S. Aune; K. Barth; A. Belov; H. Barauninger; G. Cantatore; J. M. Carmona; J. F. Castel; S. A. Cetin; F. Christensen; T. Dafni; M. Davenport; A. Dermenev; K. Desch; B. Dobrich; C. Eleftheriadis; G. Fanourakis; E. Ferrer-Ribas; H. Fischer; W. Funk; 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; S. Kostoglou; N. Kralj; M. Krcmar; C. 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. Schmidl; Yannis K. Semertzidis; S. K. Solanki; L. Stewart; T. Vafeiadis; J. K. Vogel; M. Vretenar; W. Wuensch; S. C. Yildiz; K. Zioutas
Publication Date
2019-01
Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, v.2019, no.01, pp.032 -
Publisher
IOP PUBLISHING LTD
Abstract
We report on a new search for solar chameleons with the CERN Axion Solar Telescope (CAST). A GridPix detector was used to search for soft X-ray photons in the energy range from 200 eV to 10 keV from converted solar chameleons. No significant excess over the expected background has been observed in the data taken in 2014 and 2015. We set an improved limit on the chameleon photon coupling, βγlesssim#5.7×1010 for 1<βm<106 at 95% C.L. improving our previous results by a factor two and for the first time reaching sensitivity below the solar luminosity bound for tachocline magnetic fields up to 12.5 T. c 2019 CERN.
URI
https://pr.ibs.re.kr/handle/8788114/5344
ISSN
1475-7516
Appears in Collections:
Center for Axion and Precision Physics Research(액시온 및 극한상호작용 연구단) > Journal Papers (저널논문)
Files in This Item:
1. [PDF] Improved search for solar chameleons with a GridPix detector at CAST (IBS & KAIST 소속표기).pdfDownload

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