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We estimate pionic decay widths of the narrow charm-strange resonances$D_{sj}(2317)$ and $D_{sj}(2460)$ using the $^3P_0$ model. Their one-piondecays occur through $\eta$-$\pi^0$ mixing while the two-pion decays of$D_{sj}(2460)$ occur through the virtual $f_0(980)$ meson. The mixing between$^3P_1$ and $^1P_1$ states enhances the single pion decay width of$D_{sj}(2460)$ and suppresses its double pion decay width significantly. Thetwo-pion decay width of $D_{sj}(2460)$ is much smaller than its one-pion decaywidth. As a byproduct, we also calculate pionic decay widths of $B_{sj}(5765)$,$B_{sj}(5765)$ mesons in the $(0^+, 1^+)$ heavy doublet.Comment: Comments and suggestions welcome

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

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Pionic decays ofDsj(2317),Dsj(