论文标题
关于$ x（6900）$的一些评论
Some remarks on $X(6900)$
论文作者
论文摘要
在DI-$ \ jpsi $系统中发现的$ X（6900）$的LHCB数据的分析是使用动量依赖性的类似Flatté的参数化进行的。使用杆计数规则和光谱密度函数总和规则的使用得出一致的结论，即如果只有di-$ \ jpsi $实验数据与当前统计数据，则可能可以区分$ x（6900）$的$ x（6900）$的性质。尽管如此，我们发现Di-$ j/ψ$系统中的最低状态很可能具有与$ x（6900）$相同的量子数，而$ x（6900）$的量子可能不会被解释为$ j/ψ-ψ（2s）$分子状态。
The analysis of the LHCb data on $X(6900)$ found in the di-$\jpsi$ system is performed using a momentum-dependent Flatté-like parameterization. The use of the pole counting rule and spectral density function sum rule give consistent conclusions that both confining states and molecular states are possible, or it is unable to distinguish the nature of $X(6900)$, if only the di-$\jpsi$ experimental data with current statistics are available. Nevertheless, we found that the lowest state in the di-$J/ψ$ system has very likely the same quantum numbers as $X(6900)$, and $X(6900)$ is probably not interpreted as a $J/ψ-ψ(2S)$ molecular state.
