English

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

High Energy Physics - Phenomenology 2008-11-26 v4 High Energy Physics - Experiment

Abstract

We propose an explanation of the new resonances observed in Ds()+π0D_s^{(*)+} \pi^0 decays. We suggest that the data can be explained by the mixing of conventional p-wave excited Ds+D_s^+ mesons with 4-quark states. The narrow states observed in Ds+π0D_s^+ \pi^0 and Ds+π0D_s^{*+}\pi^0 are primarily p-wave DsJD_{sJ}^{*} states, while the predominantly 4-quark states are shifted above D()KD^{(*)} 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.

Keywords

Cite

@article{arxiv.hep-ph/0307054,
  title  = {Comment on the new $D_s^{(*)+} \pi^0$ resonances},
  author = {Thomas E. Browder and Sandip Pakvasa and Alexey A. Petrov},
  journal= {arXiv preprint arXiv:hep-ph/0307054},
  year   = {2008}
}

Comments

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

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