Probing the two-pole structure of the $D_0^*(2300)$ with an $SU(3)$ flavor filter

We propose an $SU(3)$ flavor-filtering strategy to resolve the two-pole structure associated with the $D_0^*(2300)$ and to probe its flavor-sextet component directly in invariant-mass distributions. In unitarized chiral dynamics, the two poles originate predominantly from different irreducible repre