Comment on the new Ds(*)+ π0 resonances

We propose an explanation of the new resonances observed in Ds((*)+)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 (DK)-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. (C) 2003 Elsevier B.V. All rights reserved.