Search for the decay h_c -> pi0 J/psi
Search for the decay h_c -> pi0 J/psi
复制标题
搜索衰变 h_c -> pi0 J/psi
DOI：
10.1007/jhep05(2022)003
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发表时间：
2022
影响因子：
5.4
通讯作者：
BESIII Collaboration
中科院分区：
文献类型：
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作者：
BESIII Collaboration
用反应e+e→πhc产生的HC样品搜索衰变h c−→π+π−0 J/−。数据样品用BES III探测器收集，质心能量在4.189到4.437 GeV之间，对应的总积分光度为11Fb GeV 1。没有观察到明显的信号。在90%置信度下，支化比(hc→π0 J/ψ)/(hc→γηc→γK+K−π0)和支化分数(hc→π0 J/ψ)的上限分别为7.5×10−2和4.7×10−4。后者是使用测量的归一化通道的分支分数从前者导出的。这是对衰变上限h c→π0 J/ψ的首次确定。
A search for the decay h c→ π 0 J/ψ is performed using a sample of hc produced in the reaction e+ e−→ π+ π− h c. The data samples were collected with the BESIII detector at center-of-mass energies between 4.189 and 4.437 GeV, corresponding to a total integrated luminosity of 11 fb− 1. No significant signal is observed. Upper limits on the branching ratio(h c→ π 0 J/ψ)/(h c→ γη c→ γK+ K− π 0) and on the branching fraction(h c→ π 0 J/ψ) are determined to be 7. 5× 10− 2 and 4. 7× 10− 4 at 90% confidence level, respectively. The latter is derived from the former using the measured branching fraction of the normalization channel. This is the first determination of the upper limit of the decay h c→ π 0 J/ψ.