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Observation of a new DsJ meson in B+ -> D0-bar D0 K+ decays

The Belle Collaboration·K. Abe
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Abstract

We report the observation of a new DsJ meson produced in B+ -> D0-bar DsJ -> D0-bar D0 K+. This state has a mass of M = 2715 +-11(stat) +11-14(syst) MeV/c^2, a width Gamma = 115 +-20(stat) +36-32(syst) MeV/c^2 and a spin-parity 1-. The results are based on an analysis of 449 million BB-bar events collected at the Upsilon(4S) resonance in the Belle detector at the KEKB asymmetric energy e+e- collider.

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The Belle Collaboration, K. Abe. 2006-08-10. Observation of a new DsJ meson in B+ -> D0-bar D0 K+ decays. https://arxiv.org/abs/hep-ex/0608031

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