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European Physical Journal
In this paper, we make a detailed discussion on the $$\eta $$ η and $$\eta ^\prime $$ η ′ -meson leading-twist light-cone distribution amplitude $$\phi _{2;\eta ^{(\prime )}}(u,\mu )$$ ϕ 2 ; η ( ′ ) ( u , μ ) by using the QCD sum rules appr