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The reaction was chosen because by varying the $\\pi^0 a_0(980) (f_0(980))$ invariant mass one goes through the peak of a triangle singularity emerging from $D_s^+ \\to \\pi^+\\bar K^* K$, followed by $\\bar K^* \\to \\bar K \\pi^0$ and the further merging of $K \\bar K$ to produce the $a_0(980)$ or $f_0(980)$. 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