Observation of $\bar{B^0}$ -> DsJ*(2317)+ K- decay

A. Drutskoy; et al. (for the Belle Collaboration)

arXiv:hep-ex/0409026·hep-ex·August 14, 2019

Observation of $\bar{B^0}$ -> DsJ*(2317)+ K- decay

A. Drutskoy, et al. (for the Belle Collaboration)

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Abstract

The decays $\overset{ˉ}{B^{0}} \to D_{s J}^{+} K^{-}$ and $\overset{ˉ}{B^{0}} \to D_{s J}^{-} π^{+}$ are studied for the first time. A significant signal is observed in the $\overset{ˉ}{B^{0}} \to D_{s J}^{*} (2317)^{+} K^{-}$ decay channel with $B (\overset{ˉ}{B^{0}} \to D_{s J}^{*} (2317)^{+} K^{-}) \times B (D_{s J}^{*} (2317)^{+} \to D_{s}^{+} π^{0}) = (5. 3_{- 1.3}^{+ 1.5} \pm 0.7 \pm 1.4) \times 1 0^{- 5}$ . No signals are observed in the $\overset{ˉ}{B^{0}} \to D_{s J}^{*} (2317)^{-} π^{+}$ , $\overset{ˉ}{B^{0}} \to D_{s J} (2460)^{+} K^{-}$ and $\overset{ˉ}{B^{0}} \to D_{s J} (2460)^{-} π^{+}$ decay modes, and upper limits are obtained. The analysis is based on a dataset of 140 fb $^{- 1}$ collected by the Belle experiment at the asymmetric $e^{+} e^{-}$ collider KEKB.

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