标题： $e^+e^- \to ωπ^0 \to π^0π^0γ$交叉截面的SND探测器更新测量 显示英文标题

标题： Updated measurement of the $e^+e^- \to ωπ^0 \to π^0π^0γ$ cross section with the SND detector

摘要： 我们分析了在VEPP-2000 $e^+e^-$ 对撞机的质心系能量范围1.05--2.00 GeV内，使用SND探测器收集的37 pb $^{-1}$ 数据样本，并给出了对 $e^+e^- \to \omega \pi^0 \to \pi^0\pi^0\gamma$ 截面的更新测量结果。 特别是，我们根据部分数据修正了之前测量中在辐射修正计算方面的错误。 测量得到的截面通过包含三个 $\rho$-类似态的矢量介子主导模型进行拟合，并用于检验 $\tau^-\to\omega\pi^-\nu_{\tau}$ 衰变中的守恒矢量流假设。 显示英文摘要

摘要： We analyze a 37 pb$^{-1}$ data sample collected with the SND detector at the VEPP-2000 $e^+e^-$ collider in the center-of-mass energy range 1.05--2.00 GeV and present an updated measurement of the $e^+e^- \to \omega \pi^0 \to \pi^0\pi^0\gamma$ cross section. In particular, we correct the mistake in radiative correction calculation made in our previous measurement based on a part of the data. The measured cross section is fitted with the vector meson dominance model with three $\rho$-like states and used to test the conserved vector current hypothesis in the $\tau^-\to\omega\pi^-\nu_{\tau}$ decay.