论文标题
$ e^+e^ - \rightArrowπz_c（3900）\rightArrowππj/ψ$和$ e^+e^+e^ - \rightArrowπz_c（3900）\rightArrowπdπdπdπdπdigdoudd\ bar {d}^{d}^{*} $
Combined fit to the cross sections of $e^+e^- \rightarrow πZ_c(3900) \rightarrow ππJ/ψ$ and $e^+e^- \rightarrow πZ_c(3900) \rightarrow πD\bar{D}^{*}$
论文作者
论文摘要
$ e^+e^ - \rightArrowπz_c（3900）\rightArrowππj/ψ$和$ e^+e^+e^ - \rightArrowπz_c（3900）\rightArrowπdπdπd\ bar {d}^{*} $的横截面。我们尝试通过一个Breit-Wigner功能对横截面进行合并拟合，拟合结果显示结构的质量和宽度为$ M =（4232 \ pm5）$ MEV/$ C^2 $，$γ=（65 \ pm21）$ MEV。比率$ \ frac {\ Mathcal {b}（z_c（3900）\ rightarrow d \ bar {d}^{*}）} {\ Mathcal {b}（z_c（3900）\rightArrowπj/ψ）$确定为$（16 \ pm6）。我们还尝试使用两个Breit-Wigner函数将横截面拟合，而我们无法得出有关第二个结构的任何确定结论。需要进行更多的测量，以提高对$ e^+e^ - \rightarrowπz_c（3900）$线形状的理解。
The cross sections of $e^+e^- \rightarrow πZ_c(3900) \rightarrow ππJ/ψ$ and $e^+e^- \rightarrow πZ_c(3900) \rightarrow πD\bar{D}^{*}$ have been measured by BESIII experiment. We try to perform a combined fit to the cross sections with one Breit-Wigner function, the fit results show the structure's mass and width are $M=(4232\pm5)$ MeV/$c^2$, $Γ=(65\pm21)$ MeV. The ratio $\frac{\mathcal{B}(Z_c(3900)\rightarrow D\bar{D}^{*})}{\mathcal{B}(Z_c(3900)\rightarrowπJ/ψ)}$ is determined to be $(16\pm6)$. We also try to fit the cross sections with two Breit-Wigner functions, while we can't come to any definitive conclusions about the second structure. More measurements are desired to improve the understanding of $e^+e^- \rightarrow πZ_c(3900)$ line shape.
