Observation of a New D_s Meson Decaying to D K at a Mass of 2.86 GeV/c^2

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  • 27 July 2006
Abstract
We observe a new D_s meson with mass (2856.6 +/- 1.5 +/- 5.0)$ MeV/c^2 and width Gamma=(48 +/- 7 +/- 10) MeV/c^2 decaying into D^0 K^+ and D^+K^0_S. To obtain this result we use 240 fb-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.

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