An improved limit on the axion–photon coupling from the CAST experiment
An improved limit on the axion–photon coupling from the CAST experiment
We have searched for solar axions or similar particles that couple to two photons by using the CERN Axion Solar Telescope (CAST) setup with improved conditions in all detectors. From the absence of excess X-rays when the magnet was pointing to the Sun, we set an upper limit on the …