论文标题
了解$ 0^{++} $和$ 2^{++} $ Charmonium（-like）状态附近3.9 GEV
Understanding the $0^{++}$ and $2^{++}$ charmonium(-like) states near 3.9 GeV
论文作者
论文摘要
我们建议在$ j/ψ\，ω$通道中观察到的$ x（3915）$与$ d_s^+ d_s^ - $ s $ s $ -wave $ d_s^sol od d_ $ colorcond of $χ_{C2}（3930）$和$ x（3960）$的状态相同。此外，$ j^{pc} = 0^{++} $ {在当前{\ it everment of trame physics}中分配给$ x（3915）$的$ b^+\ to d^+d^-k^+$}中的component of trames Physics}中的$ x（3915）$具有与$ x（3960）$相同的来源，该起源于$ x（3960）$ 3.94〜gev。要检查提案，分析了$ d \ bar d $和$ d_s^+ d_s^ - $ b $衰减中的$ n频道和$γγ$融合反应，考虑到$ d \ bar d $ d $ - $ d_s \ $ d_s \ bar d_s \ bar d_s $ - $ d_s $ - $ d^*$ d^*$ d^*$ d^*$ d_s^$ d_s^*$ d_s^*$ d_ $ c c c c c c c c^*$ c c。 $ 0^{++} $和$ 2^{++} $ state添加了另外引入。发现不同过程中的所有数据都可以同时进行良好的再现，并且耦合通道动力学分别产生四个隐藏的charm标量分子状态，质量分别为3.73、3.94、3.99和4.23〜GEV。结果可能会加深我们对Charmonia的光谱以及迷人的Hadron之间相互作用的理解。
We propose that the $X(3915)$ observed in the $J/ψ\,ω$ channel is the same state as the $χ_{c2}(3930)$, and the $X(3960)$, observed in the $D_s^+D_s^-$ channel, is an $S$-wave $D_s^+ D_s^-$ hadronic molecule. In addition, the $J^{PC}=0^{++}$ {component in the $B^+\to D^+D^-K^+$} assigned to the $X(3915)$ in the current {\it Review of Particle Physics} has the same origin as the $X(3960)$, which has a mass around 3.94~GeV. To check the proposal, the available data in the $D\bar D$ and $D_s^+ D_s^-$ channels from both $ B$ decays and $γγ$ fusion reaction are analyzed considering both the $D\bar D$-$D_s\bar D_s$-$D^*\bar D^*$-$D_s^*\bar D_s^*$ coupled channels with $0^{++}$ and a $2^{++}$ state introduced additionally. It is found that all the data in different processes can be simultaneously well reproduced, and the coupled-channel dynamics produce four hidden-charm scalar molecular states with masses around 3.73, 3.94, 3.99 and 4.23~GeV, respectively. The results may deepen our understanding of the spectrum of charmonia as well as of the interactions between charmed hadrons.
