A search for solar axion induced signals with COSINE-100

Abstract

We present results from a search for solar axions with the COSINE-100 experiment. We find no evidence of solar axion events from a data-set of 6,303.9 kg . days exposure and set a 90% confidence level upper limit on the axion-electron coupling, g(ae), of 1.70 x 10(-11) for an axion mass less than 1 keV/c(2). This limit excludes QCD axions heavier than 0.59 eV/c(2) in the DFSZ model and 1681 eV/c(2) in the KSVZ model. (C) 2019 Elsevier B.V. All rights reserved.