The CERN Axion Solar Telescope (CAST) has extended its search for solar axions by using (3)He as ... more The CERN Axion Solar Telescope (CAST) has extended its search for solar axions by using (3)He as a buffer gas. At T=1.8 K this allows for larger pressure settings and hence sensitivity to higher axion masses than our previous measurements with (4)He. With about 1 h of data taking at each of 252 different pressure settings we have scanned the axion mass range 0.39 eV≲m(a)≲0.64 eV. 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(aγ)≲2.3×10(-10) GeV(-1) at 95% C.L., the exact value depending on the pressure setting. Kim-Shifman-Vainshtein-Zakharov axions are excluded at the upper end of our mass range, the first time ever for any solar axion search. In the future we will extend our search to m(a)≲1.15 eV, comfortably overlapping with cosmological hot dark matter bounds.
The CERN Axion Solar Telescope (CAST) is currently the most sensitive axion helioscope designed t... more The CERN Axion Solar Telescope (CAST) is currently the most sensitive axion helioscope designed to search for axions produced by the Primakoff process in the solar core. CAST is using a Large Hadron Collider (LHC) test magnet where axions could be converted into X-rays with energies up to 10 keV. During the phase I, the experiment operated with vacuum inside
... de Fısica Nuclear y Altas Energıas, Universidad de Zaragoza, Zaragoza, Spain 7 Dogus Universi... more ... de Fısica Nuclear y Altas Energıas, Universidad de Zaragoza, Zaragoza, Spain 7 Dogus University, Istanbul, Turkey 8 Enrico Fermi Institute and KICP, University of Chicago, Chicago, IL, USA 9 Aristotle University of Thessaloniki, Thessaloniki, Greece 10 National Center for ...
The CERN Axion Solar Telescope (CAST) has extended its search for solar axions by using (3)He as ... more The CERN Axion Solar Telescope (CAST) has extended its search for solar axions by using (3)He as a buffer gas. At T=1.8 K this allows for larger pressure settings and hence sensitivity to higher axion masses than our previous measurements with (4)He. With about 1 h of data taking at each of 252 different pressure settings we have scanned the axion mass range 0.39 eV≲m(a)≲0.64 eV. 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(aγ)≲2.3×10(-10) GeV(-1) at 95% C.L., the exact value depending on the pressure setting. Kim-Shifman-Vainshtein-Zakharov axions are excluded at the upper end of our mass range, the first time ever for any solar axion search. In the future we will extend our search to m(a)≲1.15 eV, comfortably overlapping with cosmological hot dark matter bounds.
The CERN Axion Solar Telescope (CAST) is currently the most sensitive axion helioscope designed t... more The CERN Axion Solar Telescope (CAST) is currently the most sensitive axion helioscope designed to search for axions produced by the Primakoff process in the solar core. CAST is using a Large Hadron Collider (LHC) test magnet where axions could be converted into X-rays with energies up to 10 keV. During the phase I, the experiment operated with vacuum inside
... de Fısica Nuclear y Altas Energıas, Universidad de Zaragoza, Zaragoza, Spain 7 Dogus Universi... more ... de Fısica Nuclear y Altas Energıas, Universidad de Zaragoza, Zaragoza, Spain 7 Dogus University, Istanbul, Turkey 8 Enrico Fermi Institute and KICP, University of Chicago, Chicago, IL, USA 9 Aristotle University of Thessaloniki, Thessaloniki, Greece 10 National Center for ...
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