# title
Observation of a narrow resonance of mass 2.46 GeV/c(2) decaying to D-s(*+)pi(0) and confirmation of the D-sJ(*)(2317) state

# abstract
Using 13.5 fb-1 of e+e- annihilation data collected with the CLEO II detector, we have observed a narrow resonance decaying to D*s+ 0 with a mass near 2.46 GeV/c2. The search for such a state was motivated by the recent discovery by the BaBar Collaboration of a narrow state at 2.32 GeV/c 2, the D*sJ(2317)+, that decays to D s+ 0. Reconstructing the Ds+ 0 and D*s+ 0 final states in CLEO data, we observe peaks in both of the corresponding reconstructed mass difference distributions, M(D s0) = M(Ds0) - M(D s) and M(D*s 0) = M(D*s 0) - M(D*s), both of them at values near 350 MeV/c2. We interpret these peaks as signatures of two distinct states, the D*sJ(2317)+ plus a new state, designated as the DsJ(2463)+. Because of the similar M values, each of these states represents a source of background for the other if photons are lost, ignored or added. A quantitative accounting of these reflections confirms that both states exist. We have measured the mean mass differences M(Ds 0) = 350.0 1.2 (stat)  1.0 (syst) MeV/c2 for the D*sJ(2317)+ state, and M(D* s 0) = 351.2  1.7 (stat)  1.0 (syst) MeV/c2 for the new DsJ(2463)+ state. We have also searched, but find no evidence, for decays of the two states via the channels D*s+ , Ds+ , and Ds+ + -. The observations of the two states at 2.32 and 2.46 GeV/c2, in the D s+ 0 and D*s+ 0 decay channels, respectively, are consistent with their interpretations as cs mesons with an orbital angular momentum L = 1 and spin and parity JP = 0+ and 1+.  2003 The American Physical Society.

# authorList[]
Besson, D., Anderson, S., Frolov, V. V., Gong, D. T., Kubota, Y., Li, S. Z., ... Edwards, K. W.