论文标题
$ J/ψ\rightarrowρπ$的分支分数的测量
Measurement of the branching fraction of $J/ψ\rightarrowρπ$ at KEDR
论文作者
论文摘要
我们介绍了衰减$ j/ψ\rightarrowρπ$的研究。结果基于KEDR检测器在VEPP-4M撞机机上收集的52万美元$ J/ψ$事件。 The branching fractions are measured to be $\B(J/ψ\rightarrow ρπ) = \big(2.072\pm 0.017 \pm 0.062 \big)\cdot 10^{-2}$ and $\B(J/ψ\rightarrow π^+π^-π^0) = \big(1.878 \pm 0.013 \pm 0.051 \ big)\ cdot 10^{ - 2} $,其中第一个不确定性是统计的,第二个系统是系统的。我们的结果比以前的相对测量更精确。
We present the study of the decay $J/ψ\rightarrow ρπ$. The results are based on of 5.2~million $J/ψ$ events collected by the KEDR detector at the VEPP-4M collider. The branching fractions are measured to be $\B(J/ψ\rightarrow ρπ) = \big(2.072\pm 0.017 \pm 0.062 \big)\cdot 10^{-2}$ and $\B(J/ψ\rightarrow π^+π^-π^0) = \big(1.878 \pm 0.013 \pm 0.051 \big)\cdot 10^{-2}$, where the first uncertainties are statistical and the second systematic. Our results are more precise than the previous relative measurements.