AI 中文总结
BESIII合作组利用质心系能量4682 MeV的数据对$e^+e^-\rightarrow D^0D^-π^++c.c.$过程分波分析，观测到带电类粲偶素$X(3790)^-$，测量其量子数、质量等参数，同时测得相关粲介子的质量与宽度。
AI 中文摘要
我们使用在北京谱仪III（BESIII）探测器上收集的质心系能量为4682 MeV的数据样本，对过程$e^+e^-\rightarrow D^0D^-π^++c.c.$进行分波分析。在$D^0D^-$质量阈值附近观测到一个带电结构，命名为$X(3790)^-$，其显著性为5.3σ，包含系统不确定性和寻像效应。假设该结构符合Flatté描述，测得$X(3790)^-$的量子数为$J^P=1^-$，其质量和对$D^0D^-$道的耦合强度分别为$(3794.7\fat{±}6.0\fat{±}8.7)$ MeV/$c^2$和$(1.6\fat{±}0.2\fat{±}0.2)$ GeV，其中第一个不确定度为统计不确定度，第二个为系统不确定度。此外，我们还报告了对$D_{2}^{*}(2460)$、$D_{1}^{*}(2600)$和$D_{1}^{*}(2760)$粲介子的质量和宽度的测量结果。
英文摘要
We present a partial wave analysis of the process $e^+e^- \rightarrow D^0 D^- π^++c.c.$ using a data sample collected with the BESIII detector at a center-of-mass energy of 4682~MeV. A charged structure, referred to as the $X(3790)^-$ near the $D^0D^-$ mass threshold with a significance of $5.3σ$, which includes systematic uncertainties and the look-elsewhere effect. Assuming a Flatté description of the structure, the quantum numbers of the $X(3790)^-$ are found to be $J^{P}=1^{-}$, and its mass and coupling strength to the $D^0D^-$ channel are determined to be $(3794.7 \pm 6.0 \pm 8.7)$~MeV/$c^2$ and $(1.6 \pm 0.2 \pm 0.2)$~GeV, respectively, where the first uncertainties are statistical and the second systematic. In addition, we also report measurements of the masses and widths of the $D_{2}^{*}(2460)$, $D_{1}^{*}(2600)$, and $D_{1}^{*}(2760)$ charmed mesons.
