Strong two-body decays of the S-wave molecule state

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• 作者：Dian-Yong Chen^a ; ^b ; ^c ; ^{chendy@impcas.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Cheng-Jian Xiao^a ; ^d
• 关键词：Decay behavior ; Ds+Ds&minus ; molecule state ; X(3915)X(3915)
• 刊名：Nuclear Physics A
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：947
• 期：Complete
• 页码：26-37
• 全文大小：401 K

文摘

The decay behaviors of the 394948cd">$D_s^{+}{D}_s^{-}$ molecule state have been studied in an effective Lagrangian approach. We find that the 394948cd">$D_s^{+}{D}_s^{-}$ molecule state dominantly decays into $D\overline{D}$ and η_cη${\eta }_c\eta$. The total and partial widths are strongly dependent on the model parameter, however, the ratio of the partial widths for η_cη${\eta }_c\eta$ and $D\overline{D}$ is relatively stable and predicted to be about 0.17∼0.22$0.17\sim 0.22$. In addition, our evaluation shows that the partial width for the 394948cd">$D_s^{+}{D}_s^{-}$ molecule to J/ψω$J/\psi \omega$ is too small to be observed, thus the charmonium-like state X(3915)$X(3915)$ should not be a 394948cd">$D_s^{+}{D}_s^{-}$ molecule state.