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arXiv 0810.5611hep-ex
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在$\sqrt s= 3.773$,3.650和3.6648 GeV观测到的含$π^0π^0$的$e^+e^-\to$排他轻强子截面的测量

Measurements of the observed cross sections for $e^+e^-\to$ exclusive light hadrons containing $π^0π^0$ at $\sqrt s= 3.773$, 3.650 and 3.6648 GeV

BES Collaboration

摘要:

通过分析北京正负电子对撞机(BEPC)BES-Ⅱ探测器在$\sqrt s= 3.773$、3.650和3.6648 GeV分别采集的17.3、6.5和1.0 pb $^{-1}$数据集,测量了$e^+e^-\to π^+π^-π^0π^0$、$K^+K^-π^0π^0$、$2(π^+π^-π^0)$、$K^+K^-π^+π^-π^0π^0$和$3(π^+π^-)π^0π^0$在三个能点的观测截面。基于这些截面,我们设定了观察到的截面的上限,并且PDMATHAMT在90% C. L.时衰减到这些最终状态的分支分数。

英文摘要:

By analyzing the data sets of 17.3, 6.5 and 1.0 pb$^{-1}$ taken, respectively, at $\sqrt s= 3.773$, 3.650 and 3.6648 GeV with the BES-II detector at the BEPC collider, we measure the observed cross sections for $e^+e^-\to π^+π^-π^0π^0$, $K^+K^-π^0π^0$, $2(π^+π^-π^0)$, $K^+K^-π^+π^-π^0π^0$ and $3(π^+π^-)π^0π^0$ at the three energy points. Based on these cross sections we set the upper limits on the observed cross sections and the branching fractions for $ψ(3770)$ decay into these final states at 90% C.L..

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。

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