We comment on the recent observation of the decay mode D-sJ*(2860)(+) -> D*K by the BABAR Collaboration [B. Aubert et al. (BABAR Collaboration), arXiv:0908.0806], and contest their conclusion that the data exclude a 0(+) assignment for the D-sJ*(2860)(+). In particular, we argue that the observed branching fraction B(D-sJ*(2860)(+) -> D*K/B(D-sJ*(2860)(+) -> DK) = 1.1 +/- 0.15 +/- 0.19 supports the existence of two largely overlapping resonances at about 2.86 GeV, namely, a pair of radially excited tensor (2(+)) and scalar (0(+)) c (s) over bar states. This scenario is further justified by comparing with the corresponding excited charmonium states. Also other aspects of the charm-strange spectrum are discussed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据