Options for the SELEX state D sJ +(2632)
We consider possible assignments for the DsJ+(2632), which was recently reported in Ds+η and D0K+ final states by the SELEX Collaboration at Fermilab. The most plausible quark model assignment for this state is the first radial excitation (23S1) of the cs̄ Ds*(2112), although the predicted mass and strong decay branching fractions for this assignment are not in agreement with the SELEX data. The reported dominance of Dsη over DK appears especially problematic. An intriguing similarity to the K*(1414) is noted. 23S1-D13 configuration mixing is also considered, and we find that this effect is unlikely to resolve the branching fraction discrepancy. Other interpretations as a cs̄-hybrid or a two-meson molecule are also considered, but appear unlikely. Thus, if this state is confirmed, it will require reconsideration of the systematics of charmed meson spectroscopy and strong decays.
|Journal||Physics Letters B|
Barnes, T., Close, F.E., Dudek, J.J., Godfrey, S, & Swanson, E.S. (2004). Options for the SELEX state D sJ +(2632). Physics Letters B, 600(3-4), 223–230. doi:10.1016/j.physletb.2004.08.075