Implication of BaBar's new data on the Dₛ₁(2710) and DsJ(2860)

الأصل · EN

The strong decays of the Dₛ₁(2710) and DsJ(2860) are investigated in the framework of the ³P₀ model. Its decay properties newly reported by the BaBar Collaboration can be reasonably accounted for in the presence of the Dₛ₁(2710) being a mixture of the Dₛ(2 ³S₁) and Dₛ(1 ³D₁). The orthogonal partner of the Dₛ₁(2710) is expected to have a mass of about 2.66 2.9 GeV in quark models and a width of about 40 60 MeV in the ³P₀ model. The predicted decay properties turn out to be consistent with the BaBar's new data in both the orthogonal partner of the Dₛ₁(2710) and the Dₛ(1 ³D₃) interpretations for the DsJ(2860). The available experimental information is not enough to distinguish these two possibilities. The E1 radiative transitions of the Dₛ₁(2710) and DsJ(2860) are also studied. We tend to conclude that the Dₛ₁(2710) can be identified as a mixture of the Dₛ(2 ³S₁) and Dₛ(1 ³D₁), and the DsJ(2860) could be either the orthogonal partner of the Dₛ₁(2710) or the Dₛ(1 ³D₃). Further experimental information on the DsJ(2860) in the Dₛη, Dₛη, and DK channels is needed.