Axion-electron coupling from the RGB tip of Globular Clusters (1802.10357v1)

Published 28 Feb 2018 in astro-ph.SR

Abstract: We present a preliminary study of the Globular Cluster RGB devoted to improve the available constraint for the axion-electron coupling. By means of multi-band IR photometry of the cluster M3 we obtain g_{ae}/10^{-13} < 2.57 (95\% C.L.).

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