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25 April 2024

» arxiv » 1307.1985

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CAST solar axion search with 3^He buffer gas: Closing the hot dark matter gap
M. Arik ; S. Aune ; K. Barth ; A. Belov ; S. Borghi ; H. Brauninger ; G. Cantatore ; J. M. Carmona ; S. A. Cetin ; J. I. Collar ; E. Da Riva ; T. Dafni ; M. Davenport ; C. Eleftheriadis ; N. Elias ; G. Fanourakis ; E. Ferrer-Ribas ; P. Friedrich ; J. Galan ; J. A. Garcia ; A. Gardikiotis ; J. G. Garza ; E. N. Gazis ; T. Geralis ; E. Georgiopoulou ; I. Giomataris ; S. Gninenko ; H. Gomez ; M. Gomez Marzoa ; E. Gruber ; T. Guthorl ; R. Hartmann ; S. Hauf ; F. Haug ; M. D. Hasinoff ; D. H. H. Hoffmann ; F. J. Iguaz ; I. G. Irastorza ; J. Jacoby ; K. Jakovcic ; M. Karuza ; K. Konigsmann ; R. Kotthaus ; M. Krcmar ; M. Kuster ; B. Lakic ; P. M. Lang ; J. M. Laurent ; A. Liolios ; A. Ljubicic ; V. Lozza ; G. Luzon ; S. Neff ; T. Niinikoski ; A. Nordt ; T. Papaevangelou ; M. J. Pivovaroff ; G. Raffelt ; H. Riege ; A. Rodriguez ; M. Rosu ; J. Ruz ; I. Savvidis ; I. Shilon ; P. S. Silva ; S. K. Solanki ; L. Stewart ; A. Tomas ; M. Tsagri ; K. van Bibber ; T. Vafeiadis ; J. Villar ; J. K. Vogel ; S. C. Yildiz ; K. Zioutas ;
Date:	8 Jul 2013
Abstract:	The CERN Axion Solar Telescope (CAST) has finished its search for solar axions with 3^He buffer gas, covering the search range 0.64 eV < m_a <1.17 eV. This closes the gap to the cosmological hot dark matter limit and actually overlaps with it. From the absence of excess X-rays when the magnet was pointing to the Sun we set a typical upper limit on the axion-photon coupling of g_ag < 3.3 x 10^{-10} GeV^{-1} at 95% CL, with the exact value depending on the pressure setting. Future direct solar axion searches will focus on increasing the sensitivity to smaller values of g_a, for example by the currently discussed next generation helioscope IAXO.
Source:	arXiv, 1307.1985
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