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29 March 2024
 
  » arxiv » 1503.4561

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Search for chameleons with CAST
V. Anastassopoulos ; M. Arik ; S. Aune ; K. Barth ; A. Belov ; H. Bräuninger ; G. Cantatore ; J. M. Carmona ; S. A. Cetin ; F. Christensen ; J. I. Collar ; T. Dafni ; M. Davenport ; K. Desch ; A. Dermenev ; C. Eleftheriadis ; G. Fanourakis ; E. Ferrer-Ribas ; P. Friedrich ; J.Galán ; J. A. García ; A. Gardikiotis ; J. G. Garza ; E. N. Gazis ; T. Geralis ; I. Giomataris ; C. Hailey ; F. Haug ; M. D. Hasinoff ; D. H. H. Hofmann ; F. J. Iguaz ; I. G. Irastorza ; J. Jacoby ; A. Jakobsen ; K. Jakovčić ; J. Kaminski ; M. Karuza ; M. Kavuk ; M. Krčmar ; C. Krieger ; A. Krüger ; B. Lakić ; J. M. Laurent ; A. Liolios ; A. Ljubičić ; G. Luzón ; S. Neff ; I. Ortega ; T. Papaevangelou ; M. J. Pivovarov ; G. Raffelt ; H. Riege ; M. Rosu ; J. Ruz ; I. Savvidis ; S. K. Solanki ; T. Vafeiadis ; J. A. Villar ; J. K. Vogel ; S. C. Yildiz ; K. Zioutas ; P. Brax ; I. Lavrentyev ; A. Upadhye ;
Date 16 Mar 2015
AbstractIn this work we present a search for (solar) chameleons with the CERN Axion Solar Telescope (CAST). This novel experimental technique, in the field of dark energy research, exploits both the chameleon coupling to matter ($eta_{ m m}$) and to photons ($eta_{gamma}$) via the Primakoff effect. By reducing the X-ray detection energy threshold used for axions from 1$,$keV to 400$,$eV CAST became sensitive to the converted solar chameleon spectrum which peaks around 600$,$eV. Even though we have not observed any excess above background, we can provide a 95% C.L. limit for the coupling strength of chameleons to photons of $eta_{gamma}!lesssim!10^{11}$ for $1<eta_{ m m}<10^6$.
Source arXiv, 1503.4561
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