标题： 测量从 $\psip$电磁衰变和 $\ee$湮灭产生的最终态 $ωπ^0$、$ρη$和 $ρ η^{'}$ 显示英文标题

标题： Measurement of the final states $ωπ^0$, $ρη$, and $ρ η^{'}$ from $\psip$ electromagnetic decays and $\ee$ annihilations

摘要： 在中心-of-质量能量分别为 3.650、3.686 和 3.773 GeV 时，利用 BEPC 上的 BESII 探测器收集的数据样本，测量了$\ee \to \wpi$、$\rho\eta$和$\rho\etap$的横截面和形状因子。 此外，确定了分支分数$\psi(2S) \rar \wpi$、$\rho\eta$和$\rho\etap$分别为$(1.87^{+0.68}_{-0.62}\pm0.28)\times 10^{-5}$、$(1.78^{+0.67}_{-0.62}\pm0.17)\times 10^{-5}$和$(1.87^{+1.64}_{-1.11}\pm0.33)\times10^{-5}$。 显示英文摘要

摘要： Cross sections and form factors for $\ee \to \wpi$, $\rho\eta$, and $\rho\etap$ at center of mass energies of 3.650, 3.686, and 3.773 GeV are measured using data samples collected with the BESII detector at the BEPC. Also, the branching fractions of $\psi(2S) \rar \wpi$, $\rho\eta$, and $\rho\etap$ are determined to be $(1.87^{+0.68}_{-0.62}\pm0.28)\times 10^{-5}$, $(1.78^{+0.67}_{-0.62}\pm0.17)\times 10^{-5}$, and $(1.87^{+1.64}_{-1.11}\pm0.33)\times10^{-5}$, respectively.