Search for new decay modes of the psi_2(3823) and the process e+e- -> pi0 pi0 psi_2(3823)
Search for new decay modes of the psi_2(3823) and the process e+e- -> pi0 pi0 psi_2(3823)
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搜索 psi_2(3823) 和过程 e e- -> pi0 pi0 psi_2(3823) 的新衰减模式
DOI：
10.1103/physrevd.103.l091102
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发表时间：
2021
影响因子：
5
通讯作者：
BESIII Collaboration
中科院分区：
文献类型：
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作者：
BESIII Collaboration
利用BESIII探测器在质心能量为4.1 - 4.7 GeV的中子样品中收集的反应，对衰变、和进行了研究。在4.3- 4.7GeV的质心能量范围内观测到了这一过程，证实了以前的观测，但显著性更高，并首次发现了显著性的证据。确定了支化分数比。没有观察到任何其他衰变通道的显著信号。报道了，相对于的分支分数比的上限。该过程也被搜索，我们发现的证据的过程具有的意义。并测定了平均截面比。
The decays,,,, andare searched for using the reactionin adata sample collected at center-of-mass energies between 4.1 and 4.7 GeV with the BESIII detector. The processis observed in adata sample in the center-of-mass energy range 4.3–4.7 GeV, which confirms a previous observation but with a higher significance of, and evidence foris found with a significance offor the first time. The branching-fraction ratiois determined. No significantsignals are observed for any of the other decay channels. Upper limits of branching-fraction ratios for,,,,relative toare reported. The processis also searched for, and we find evidence for the process with a significance of. The average cross-section ratiois also determined.