Comment on the new $D_s^{(*)+} π^0$ resonances

Details Comment on the new $D_s^{(*)+} π^0$ resonances Comment on the new $D_s^{(*)+} π^0$ resonances

2003-07-04

arxiv.org/abs/hep-ph/0307054v4

Phys.Lett.B578:365-368,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figures. Updated references. To appear in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2003.10.067

We propose an explanation of the new resonances observed in $D_s^{(*)+} \pi^0$ decays. We suggest that the data can be explained by the mixing of conventional p-wave excited $D_s^+$ mesons with 4-quark states. The narrow states observed in $D_s^+ \pi^0$ and $D_s^{*+}\pi^0$ are primarily p-wave $D_{sJ}^{*}$ states, while the predominantly 4-quark states are shifted above $D^{(*)} K$ threshold and should be broad. Ranges for the mixing parameter and mass of the 4-quark state in this scenario are given. Other experimental consequences are discussed.

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