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

Abstract : We observe a new D_s meson with mass (2856.6 +/- 1.5_{stat.} +/- 5.0_{syst.}) MeV/c^2 and width (48 +/- 7_{stat.} +/- 10_{syst.}) MeV decaying into D^0 K^+ and D^+K^0_S. In the same mass distributions we also observe a broad structure with mass (2688 +/- 4_{stat.} +/- 3_{syst.}) MeV/c^2 and width (112 +/- 7_{stat.} +/- 36_{syst.}) MeV. 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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00113854
Contributor : Claudine Bombar <>
Submitted on : Wednesday, January 17, 2007 - 9:33:50 AM
Last modification on : Wednesday, September 16, 2020 - 4:16:45 PM

### Citation

B. Aubert, R. Barate, M. Bona, D. Boutigny, F. Couderc, et al.. Observation of a New $D_s$ Meson Decaying to D K at a Mass of $2.86 GeV/c^2$. Physical Review Letters, American Physical Society, 2006, 97, pp.222001. ⟨10.1103/PhysRevLett.97.222001⟩. ⟨in2p3-00113854⟩

Record views