Observation of the DsJ(2463) and Confirmation of the D[sub sJ][sup ∗](2317)

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Abstract
Using 13.5 fb−1 of e + e − annihilation data in the CLEO II detector at CESR, we have observed a new narrow state decaying to D s *+ π 0 , denoted the DsJ (2463)+. A possible interpretation holds that this is a JP = 1+ partner to the D sJ * (2317) + state recently discovered by the BaBar Collaboration which is consistent with JP = 0+. We have also confirmed the existence of the D sJ * (2317) + in its decay to D s + π 0 . We have measured the masses of both states, accounting for the cross‐feed background that the two states represent for each other, and have searched for other decay channels for both states. No narrow resonances are seen in D s ± π ∓ or D s ± π ± modes.

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