2009/12/21 by E. Ferrer-Ribas, Ribas, Esther Ferrer
Physics and Astronomy · #Atomic and Subatomic Physics Research #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.0912.4222
openalex publication_date 2009/12/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The status of the solar axion search with the CERN Axion Solar Telescope (CAST) will be discussed. Results from the first part of CAST phase II where the magnet bores were filled with \hefour gas at variable pressure in order to scan \ma up to 0.4 eV will be presented. 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 \gag \lesssim 2.17 ×10-10GeV-1 at 95% CL for \ma<0.4 eV, the exact result depending on the pressure setting. Our search for axions with masses up to about 1.2 eV using \hethree as a buffer gas is, since last year, in progress in the second part of CAST phase II. Expectations for sensibilities will be given. Near future perspectives as well as more long term options for a new helioscope experiment will be evoked.