Search for solar axions with mass around 1 eV using coherent conversion of axions into photons |
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Authors: | Y Inoue Y Akimoto R Ohta T Mizumoto A Yamamoto M Minowa |
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Institution: | 1. Department of Physics, School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan;2. International Center for Elementary Particle Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan;3. High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan;4. Research Center for the Early Universe (RESCEU), School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan |
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Abstract: | A search for solar axions has been performed using an axion helioscope which is equipped with a 2.3-m long 4 T superconducting magnet, a gas container to hold dispersion-matching gas, PIN-photodiode X-ray detectors, and a telescope mount mechanism to track the sun. A mass region around ma=1 eV was newly explored. From the absence of any evidence, analysis sets a limit on axion–photon coupling constant to be gaγγ<5.6–13.4×10−10 GeV−1 for the axion mass of 0.84<ma<1.00 eV at 95% confidence level. It is the first result to search for the axion in the gaγγ–ma parameter region of the preferred axion models with a magnetic helioscope. |
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Keywords: | 14 80 Mz 07 85 Fv 96 60 Jw |
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