Observation of a new Ds meson decaying to DK at a mass of 2.86GeV/c2

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doi:10.1103/PhysRevLett.97.222001

We observe a new Ds meson with mass (2856.6Â±1. 5statÂ±5.0syst)MeV/c2 and width (48Â±7statÂ ±10syst)MeV/c2 decaying into D0K+ and D+KS0. In the same mass distributions, we also observe a broad structure with mass (2688Â± 4statÂ±3syst)MeV/c2 and width (112Â±7statÂ ±36syst)MeV/c2. To obtain this result, we use 240fb-1 of data recorded by the BABAR detector at the PEP-II asymmetric-energy e+e- storage rings at the Stanford Linear Accelerator Center running at center-of-mass energies near 10.6 GeV.

Aubert, B., Barate, R., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., et al. (2006). Observation of a new Ds meson decaying to DK at a mass of 2.86GeV/c2. PHYSICAL REVIEW LETTERS, 97(22) [10.1103/PhysRevLett.97.222001].