Why We Do Not See the Radiative Decays of the $$D_{{s1}}^{ + }$$(2536) Meson?

The radiative decays of $${{D}_{{s1}}}{{(2536)}^{ + }}$$ charmed-strange meson have not been observed. We employ the available Babar measurements to derive an upper bound for the $${{D}_{{s1}}}{{(2536)}^{ + }} \to D_{s}^{ + }\gamma $$ decay width and discuss its implications for the quark structure of $${{D}_{{s1}}}{{(2460)}^{ + }}$$ .