arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新，休息一下吧，周末愉快~~
arXiv 1304.3036hep-ex
收藏

带电强子$Z_c^{\pm}(3900)$在$\sqrt{s}=4170$ MeV的观测和中性$Z_c^0(3900)$在$e^+e^-\to ππJ/ψ$中存在的证据

Observation of the Charged Hadron $Z_c^{\pm}(3900)$ and Evidence for the Neutral $Z_c^0(3900)$ in $e^+e^-\to ππJ/ψ$ at $\sqrt{s}=4170$ MeV

T. Xiao, S. Dobbs, A. Tomaradze, Kamal K. Seth

备注：
5 pages, 4 figures, accepted by PLB
发表信息：
Phys. Lett. B 727 (2013) 366-370
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

使用586 pb $^{-1}$的$e^+e^-$湮灭数据采取的CLEO-c探测器在$\sqrt{s}=4170$ MeV，粲偶素共振$ψ(4160)$的峰值，我们分析了衰变$ψ(4160)\to π^+π^- J/ψ$，并报告观察到的充电状态$Z_c^\pm(3900)$衰变成$π^\pm J/ψ$在$>5 σ$的显著性水平。我们得到了$M(Z_c^\pm)=3886\pm4(\text{stat})\pm 2(\text{syst})$ MeV和$Γ(Z_c^\pm)=37\pm4(\text{stat})\pm 8(\text{syst})$ MeV，它们与BES III和Belle合作组在共振Y（4260）衰变中得到的结果符合得很好.我们还提出了第一个证据，生产的中性成员的这个同位旋三重态，$Z_c^0(3900)$衰减到$π^0J/ψ$在$3.5σ$的显着性水平。

英文摘要：

Using 586 pb$^{-1}$ of $e^+e^-$ annihilation data taken with the CLEO-c detector at $\sqrt{s}=4170$ MeV, the peak of the charmonium resonance $ψ(4160)$, we analyze the decay $ψ(4160)\to π^+π^- J/ψ$, and report observation of the charged state $Z_c^\pm(3900)$ decaying into $π^\pm J/ψ$ at a significance level of $>5 σ$. We obtain $M(Z_c^\pm)=3886\pm4(\text{stat})\pm 2(\text{syst})$ MeV and $Γ(Z_c^\pm)=37\pm4(\text{stat})\pm 8(\text{syst})$ MeV, which are in good agreement with the results for this resonance obtained by the BES III and Belle Collaborations in the decay of the resonance Y(4260). We also present first evidence for the production of the neutral member of this isospin triplet, $Z_c^0(3900)$ decaying into $π^0J/ψ$ at a $3.5σ$ significance level.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

↑