Some authors consider the ψ（4415） to be the 4S or 5S excited state of a cc pair. Starting from this assumption, we study the decays of the ψ（4415） to DD, D^＊D^＊, DsDs, Ds^＊Ds^＊, and get the corresponding br...Some authors consider the ψ（4415） to be the 4S or 5S excited state of a cc pair. Starting from this assumption, we study the decays of the ψ（4415） to DD, D^＊D^＊, DsDs, Ds^＊Ds^＊, and get the corresponding branching ratios in terms of the Quark-Pair-Creation （QPC） model. Compared with the experimental data, we find that the results of 4S state agree much better than those of the 5S state. Therefore, it is more reasonable to assume the ψ（4415） to be a 4S state.展开更多
基金Natural Science Fund of Hebei Province (A2005000090,E2005000129)Fund of Education Department of Hebei Province (2007409)Research Fund for Doctoral Programs of Hebei University (Y2006081)
文摘Some authors consider the ψ（4415） to be the 4S or 5S excited state of a cc pair. Starting from this assumption, we study the decays of the ψ（4415） to DD, D^＊D^＊, DsDs, Ds^＊Ds^＊, and get the corresponding branching ratios in terms of the Quark-Pair-Creation （QPC） model. Compared with the experimental data, we find that the results of 4S state agree much better than those of the 5S state. Therefore, it is more reasonable to assume the ψ（4415） to be a 4S state.
