Options for the SELEX state D$_{s\J}^+(2632)$

Details Options for the SELEX state D$_{s\J}^+(2632)$ Options for the SELEX state D$_{s\J}^+(2632)$

2004-07-11

arxiv.org/abs/hep-ph/0407120v1

Phys.Lett.B600:223-230,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 revtex4 pages, 2 eps figures

Scientific paper

10.1016/j.physletb.2004.08.075

We consider possible assignments for the D$_{s\J}^+(2632)$, which was recently reported in D$_s^+\eta$ and D$^0$K$^+$ final states by the SELEX Collaboration at Fermilab. The most plausible quark model assignment for this state is the first radial excitation ($2^3\S_1$) of the $c\bar s$ D$_s^*(2112)$, although the predicted mass and strong decay branching fractions for this assignment are not in agreement with the SELEX data. The reported dominance of D$_s\eta$ over DK appears especially problematic. An intriguing similarity to the K$^*(1414)$ is noted. $2^3\S_1$--$^3\D_1$ configuration mixing is also considered, and we find that this effect is unlikely to resolve the branching fraction discrepancy. Other interpretations as a $c\bar s$-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.

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