论文标题
$ e^+e^ - \ to d^+_ sd^*_ {s2}（2573）^ - +C.C.
Evidence for a vector charmonium-like state in $e^+e^- \to D^+_sD^*_{s2}(2573)^-+c.c.$
论文作者
论文摘要
我们将$ e^+e^ - \的测量通过初始状态辐射（2573）^ - +c.c. $通过初始状态辐射使用921.9 fb $^{ - 1} $收集的Belle检测器的$ $^（4S）$和附近。我们找到了增强的证据，在不变质量中具有3.4 $σ$的意义，为$ d^+_ sd^*_ {s2}（2573）（2573）^ - +c.c. $ $（4619.8^{+8.9}} syst。}））这种增强的质量，宽度和量子数与Belle最近在$ 4626 MEV/$ C^2 $处于$ e^+e^ - \ to d^+_ sd_ {s1}（2536）（2536）^ - +C.C. d^+_ sd^*_ {s2}（2573）^ - +c.c. $ cross截面和$ d^*_ {s2}（2573）（2573）^ - \ to {\ bar d}^0K^ - $的分支分数是从$ d^+d^+d^+d^+_ sd^*_ sd^*_ _ {s2}（2573）（$ d thresly）^ - 5.6^ - $ 5。
We report the measurement of $e^+e^- \to D^+_sD^*_{s2}(2573)^-+c.c.$ via initial-state radiation using a data sample of an integrated luminosity of 921.9 fb$^{-1}$ collected with the Belle detector at the $Υ(4S)$ and nearby. We find evidence for an enhancement with a 3.4$σ$ significance in the invariant mass of $D^+_sD^*_{s2}(2573)^- +c.c.$ The measured mass and width are $(4619.8^{+8.9}_{-8.0}({\rm stat.})\pm2.3({\rm syst.}))~{\rm MeV}/c^{2}$ and $(47.0^{+31.3}_{-14.8}({\rm stat.})\pm4.6({\rm syst.}))~{\rm MeV}$, respectively. The mass, width, and quantum numbers of this enhancement are consistent with the charmonium-like state at 4626 MeV/$c^2$ recently reported by Belle in $e^+e^-\to D^+_sD_{s1}(2536)^-+c.c.$ The product of the $e^+e^-\to D^+_sD^*_{s2}(2573)^-+c.c.$ cross section and the branching fraction of $D^*_{s2}(2573)^-\to{\bar D}^0K^-$ is measured from $D^+_sD^*_{s2}(2573)^-$ threshold to 5.6 GeV.
