Abstract
The results of a search for solar axions from the Korea Invisible Mass Search (KIMS) experiment at the Yangyang Underground Laboratory are presented. Low-energy electron-recoil events would be produced by conversion of solar axions into electrons via the axio-electric effect in CsI(Tl) crystals. Using data from an exposure of 34,596 kg · days, we set a 90 % confidence level upper limit on the axion-electron coupling, g ae , of 1.39 × 10−11 for an axion mass less than 1 keV/c2. This limit is lower than the indirect solar neutrino bound, and fully excludes QCD axions heavier than 0.48 eV/c2 and 140.9 eV/c2 for the DFSZ and KSVZ models respectively.
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The KIMS collaboration., Yoon, Y.S., Park, H.K. et al. Search for solar axions with CsI(Tl) crystal detectors. J. High Energ. Phys. 2016, 11 (2016). https://doi.org/10.1007/JHEP06(2016)011
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DOI: https://doi.org/10.1007/JHEP06(2016)011