Observation of the D_(sJ)(2463) and Confirmation of the D_(sJ)~*(2317)

摘要

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~o, denoted the D_(sJ)(2463)~+. A possible interpretation holds that this is a J~P = 1~+ partner to the D_(sJ)~*(2317)~+ state recently discovered by the BaBar Collaboration which is consistent with J~p = 0~+. We have also confirmed the existence of the D_(sJ)~*(2317)~+ in its decay to D_s~+π~o. 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.